.......While camped near his castle at Forres in the Moray province of northeastern Scotland, the Scottish king, Duncan, receives news of the fighting from a wounded sergeant: Macbeth has defeated and beheaded a turncoat rebel leader named Macdonwald and “fix’d his head upon our battlements” (1. 2. 27). When the Norwegians launched a new assault, the sergeant says, Macbeth and another general, Banquo, set upon their foes like lions upon hares. Ross, a Scottish lord, then arrives to report the coup de grâce: Duncan’s forces have vanquished the Norwegians and a Scottish defector, the thane (lord) of Cawdor¹. The Scots extracted a tribute of ten thousand dollars from the Norwegian king, Sweno, who is begging terms of peace. After ordering Cawdor’s execution, Duncan decides to confer the title of the disloyal Cawdor on the heroic Macbeth.

.......After Macbeth presents himself before Duncan, the king heaps praises on the general for his battlefield prowess and announces that he will visit Macbeth at his castle at Inverness. Macbeth is in his glory, but his jubilation is tempered by the fact that the king’s son–Malcolm, Prince of Cumberland–is heir to the Scottish throne. In a whisper, he says to himself:

.......The Prince of Cumberland! That is a step
.......On which I must fall down or else o’erleap,
.......For in my way it lies. Stars hide your fires,
.......Let not light see my black and deep desires. (1. 4. 58-61)

Thus his appetite is further whetted for murder. Bursting with pride and ambition, Macbeth sends a letter home to his wife, Lady Macbeth, informing her of the prediction of the witches, who “have more in them than mortal knowledge” (1. 5. 3), that he will one day become king. Lady Macbeth immediately wonders why he should wait for that “one day.” He could murder Duncan and gain the throne now. But she fears he lacks what it takes to do the deed. She says that his nature “is too full ‘o the milk of human kindness / To catch the nearest way [murder]. . .” (1. 5. 6-7). A messenger arrives to tell Lady Macbeth that King Duncan will visit her and Macbeth that very night. Excited by the prospect of the king’s visit–and the murderous reception he will receive–Lady Macbeth recites some of the most chilling and cold-hearted lines in all of Shakespeare:
........A messenger arrives to tell Lady Macbeth that King Duncan will visit her and Macbeth that very night. Excited by the prospect of the king’s visit–and his death–Lady Macbeth recites some of the most chilling and cold-hearted lines in all of Shakespeare:

............................The raven himself is hoarse
..............That croaks the fatal entrance of Duncan
..............Under my battlements. Come, you spirits
..............That tend on mortal thoughts, unsex me here,
..............And fill me from the crown to the toe top-full
..............Of direst cruelty! make thick my blood;
..............Stop up the access and passage to remorse,
..............That no compunctious visitings of nature
..............Shake my fell purpose, nor keep peace between
..............The effect and it! Come to my woman's breasts,
..............And take my milk for gall, you murdering ministers,
..............Wherever in your sightless substances
..............You wait on nature's mischief! Come, thick night,
..............And pall thee in the dunnest smoke of hell,
..............That my keen knife see not the wound it makes,
..............Nor heaven peep through the blanket of the dark,
              To cry 'Hold, hold!' (1. 5. 31-46)
.
.......When Macbeth arrives home, he and his wife read murder in each other’s eyes. In anticipation of Duncan’s visit, she tells her husband to 

.............. look like the innocent flower,
..............But be the serpent under ’t. He that’s coming
..............Must be provided for; and you shall put
..............This night’s great business into my dispatch. (1. 5. 63)

.......After Duncan arrives at Macbeth's castle with his sons and his entourage, Lady Macbeth greets the king while Macbeth broods elsewhere in the castle. He is having second thoughts about the murder plot. After the feast begins, Macbeth enters the dining hall, still ruminating about his sinister plans. To kill a king is a terrible thing. His wife, who has been looking for him, follows not far behind him. Macbeth speaks his mind to her:
.
..............We will proceed no further in this business
..............He [Duncan] hath honour'd me of late; and I have bought
..............Golden opinions from all sorts of people, 
..............Which would be worn now in their newest gloss
..............Not cast aside so soon. (1. 7. 36-40)
.
.......But Lady Macbeth holds him to his vow to kill Duncan, telling him that

.......            I have given suck, and know
.......How tender ‘tis to love the babe that milks me: 
.......I would, while it was smiling in my face, 
.......Have pluck’d my nipple from his boneless gums, 
.......And dash’d the brains out, had I so sworn as you 
.......Have done to this.” (1. 7. 62-67)
.
.......Macbeth, swayed, asks her: “If we should fail–?” (1. 7. 68) She answers, “But screw your courage to the sticking-place, / And we’ll not fail” (1. 7. 70-71).  She then lays out the plan. While the king sleeps, she will ply his guards with “wine and wassail³” (1. 7. 74), enough to make them fall into deep repose. Macbeth will then kill the king with the guards’ daggers and stain their clothing with blood to cast suspicion on them.
.......After midnight, while King Duncan sleeps, Lady Macbeth gives the guards a nightcap of milk and ale (called a posset) spiked with a drug. She then rings a bell signaling Macbeth that all is ready. Before going into the king’s chamber, Macbeth hallucinates, seeing a dagger in mid-air that leads him to the king’s bedside. After committing the murder, he tells Lady Macbeth that he thought he heard a voice saying, “Sleep no more! Macbeth does murder sleep” (2. 2. 46-47) and that he “shall sleep no more” (2. 2. 47). Lady Macbeth attempts to hearten him, telling him not to dwell on “brainsickly” things (2. 2. 58). When she notices that Macbeth is still carrying the bloodied daggers, she tells him to return them to the king’s chamber and plant them on the guards as they had planned. But Macbeth, guilt-stricken, cannot bring himself to return to the room. Lady Macbeth, still bold with resolve, scolds him, then plants the daggers herself, smearing blood on the guards. 
.......Early in the morning, two noblemen, Macduff and Lennox, call at the castle to visit Duncan. “O horror, horror, horror!” (2. 3. 42), Madcuff exclaims upon entering Duncan’s chamber and discovering the body. Macbeth and Lennox, standing outside, ask what the matter is. Macduff says, 
 

..............Approach the chamber, and destroy your sight
..............With a new Gorgon⁴. Do not bid me speak. 
..............See, and then speak yourselves. (2. 3. 51-53)

.......Macduff then awakens everyone, shouting, “Murder and treason!” (2. 3. 55). Before anyone can investigate, Macbeth kills the guards, claiming their bloodied daggers are proof  that they committed the foul deed. Duncan’s sons, Malcolm and Donalbain, do not for a moment believe Macbeth. However, fearing for their own lives, they flee Scotland–Malcolm for England and Donalbain for Ireland. Because their hasty departure makes them appear guilty–Macduff speculates that they may have bribed the guards to kill Duncan–the crown passes to the nearest eligible kin, Macbeth. Duncan’s body is removed to Colmekill, a burial place for the kings of Scotland.
.......But now that he is king, Macbeth cannot rest easy. He remembers too well the prophecy of the witches that Banquo will father a kingly line. So Macbeth sends two hired assassins to murder Banquo and his son Fleance as they travel to Macbeth’s castle (now the royal palace at Forres) for dinner. Ambushing their prey, the assassins slay Banquo “with twenty trenched gashes on his head” (3. 4. 32), the First Murderer tells Macbeth. But Fleance escapes. 
.......Just as the dinner begins, one of the assassins reports the news to Macbeth. When Macbeth sits down to eat, the bloodied ghost of Banquo appears to him but to no one else. Macbeth begins to act and speak strangely, and one guest, Ross, says, “Gentlemen, rise: his highness is not well” (3. 4. 64). But Lady Macbeth entreats the guests to remain in their seats, for “my lord is often thus, / And hath been from his youth. . . .The fit is momentary; upon a thought / He will  again be well. . .” (3. 4. 65-68).  After the ghost vanishes, Macbeth regains himself and tells his guests that he has a strange infirmity “which is nothing / To those that know me” (3. 4. 103-104). The ghost then reappears and Macbeth shouts,
.
..............Avaunt⁵! and quit my sight! let the earth hide thee! 
..............Thy bones are marrowless, thy blood is cold; 
..............Thou hast no speculation⁶ in those eyes 
..............Which thou dost glare with! (3. 4. 112-115)
.
.......When Ross questions Macbeth about what he has seen, Lady Macbeth says the king’s fit has grown worse, and she sends the guests away. Later, preoccupied with the fear of being discovered, Macbeth begins to suspect that Macduff, who refused to attend the feast, is onto him. 
.......When Macbeth meets with the witches again–this time in a cavern–they conjure an apparition of an armed head that tells him he has good reason to fear Macduff. But they also ease his fears when they conjure a second apparition, that of a bloody child, which tells him that no one born of woman can harm him. A third apparition, that of a crowned child holding a tree, tells him that no one can conquer him until Birnham Wood comes to Dunsinane. 
.......After the meeting, Macbeth learns that Macduff is urging Duncan's son, Malcolm, to reclaim the throne. In revenge, Macbeth has Macduff's wife and son murdered. When Macduff hears the terrible news, he organizes an army to bring down Macbeth. 
.......Meanwhile, Lady Macbeth's conscience–long absent earlier–now begins to torture her. She talks to herself and hallucinates, imagining that her hands are covered with blood. After the forces of Malcolm and Macduff arrive at Birnham Wood and advance on Macbeth’s castle, Macbeth prepares for battle just as Lady Macbeth's battle with her conscience ends in her suicide.
.......As they advance, the invaders cut branches of trees to hold in front of them as camouflage. Birnham Wood is coming to Dunsinane–a hill near the castle–just as the witches predicted. Finally, Macbeth meets Macduff in hand-to-hand combat, bragging that he will win the day because (according to the apparition of the bloody child) no man born of a woman can harm him. However, Macduff reveals that he was not of woman born but was “untimely ripp’d” (5. 7. 62) from his mother’s womb (in a cesarean birth). Macduff then kills Macbeth, and Malcolm becomes king.

Macbeth takes place in northern Scotland and in England. The scenes in Scotland are set at or near King Duncan’s castle at Forres, at Macbeth’s castle on Dunsinane Hill in the county of Inverness, and in countryside locales where the three witches meet. A scene is also set at a castle in England.
.

Great ambition, or inordinate lust for power, ultimately brings ruin. For ignoring this ancient rule of living, Macbeth and Lady Macbeth pay with their lives. 
Evil wears a pretty cloak. Early in the play, the three witches declare that  “fair is foul,” a paradox suggesting that whatever appears good is really bad. For example, murdering Duncan appears to be a “fair” idea to Macbeth and Lady Macbeth, for Macbeth would accede to the throne. But the Macbeths soon discover that only bad has come of their deed, and their very lives–and immortal souls–are in jeopardy. Macbeth also perceives the prophecies made by the “armed head” and the “bloody child” as good omens; in fact, these prophecies are deceptive wordplays that foretell Macbeth’s downfall. In a further exposition of the theme of deceptive appearances, King Duncan speaks the following lines when arriving at Macbeth’s castle: “This castle hath a pleasant seat; the air / Nimbly and sweetly recommends itself / Unto our gentle senses” (1. 6. 3-5).
Temptation can defeat even the strongest human beings. On the battlefield, Macbeth is a lion and a leader of men. But when the witches tempt him by prophesying that he will become king of Scotland, he succumbs to the lure of power. When his resolve weakens, Lady Macbeth fortifies it with strong words. 
Guilt haunts the evildoer. Whether from prick of conscience or fear of discovery, Macbeth’s guilt begins to manifest itself immediately after he murders Duncan and the guards (Act II, Scene II). “This is a sorry sight” (2. 2. 29), he tells Lady Macbeth, looking at the blood on his hands. When he speaks further of the guilt he feels, Lady Macbeth–foreshadowing her descent into insanity–says, “These deeds must not be thought / After these ways; so, it will make us mad” (2. 2. 44-45). Macbeth then says he thought he heard a voice saying, “Sleep no more! / Macbeth does murder sleep” (2. 2. 46-47). When they hear knocking moments later at the castle door, it is the sound of their guilt as much as the sound of the knocker, Macduff..

Dates and Sources

Probable Main Source: Shakespeare based Macbeth primarily on accounts in The Chronicles of England, Scotland and Ireland (Holinshed’s Chronicles), by Raphael Holinshed (?-1580?), who began work on this history under the royal printer Reginald Wolfe. The first edition of the chronicles was published in 1577 in two volumes. Shakespeare may also have used Declaration of Egregious Popishe Impostures (1603), by Samuel Harsnett; Rerum Scoticarum Historia (1582), by George Buchanan; and published reports of witch trials in Scotland.
Date Written: Probably by 1605 but no later than 1607.
First Performance of Play: Probably between 1605 and 1607 at the Globe Theatre. It was printed in 1623 as part of the First Folio.
Number of Words in Complete Public-Domain Text:18,301. Macbeth is the shortest of Shakespeare's tragedies. It has no subplots.

Type of Play

Macbeth is a tragedy in five acts. It is an atypical tragedy in that the protagonist of the play, Macbeth, is a villain. In most other Shakespeare tragedies the protagonists–though flawed in many ways–are not villainous. 
.

Shakespeare casts a pall of darkness over the play to call attention to the evil deeds unfolding and the foul atmosphere in which they are taking place. At the very beginning of the play, Shakespeare introduces an image of dark clouds suggested in the words spoken by the First Witch:

When shall we three meet again
In thunder, lightning, or in rain? (1. 1. 3-4)

  oftentimes, to win us to our harm,
The instruments of darkness tell us truths,
Win us with honest trifles, to betray ’s [betray us]
In deepest consequence. (1. 3. 133-137) 

  Come, thick night,
And pall thee in the dunnest smoke of hell,
That my keen knife see not the wound it makes,
.Nor heaven peep through the blanket of the dark. (1. 5. 43-46)

BANQUO   How goes the night, boy?
FLEANCE   The moon is down; I have not heard the clock.
BANQUO   And she goes down at twelve.
FLEANCE   I take’t, ’tis later, sir.
BANQUO   Hold, take my sword. There’s husbandry in heaven;
Their candles are all out. Take thee that too.
A heavy summons lies like lead upon me,
And yet I would not sleep: merciful powers,
Restrain in me the cursed thoughts that nature
Gives way to in repose!

It is remarkable that almost all the scenes which at once recur to memory take place either at night or in some dark spot. The vision of the dagger, the murder of Duncan, the murder of Banquo, the sleep-walking of Lady Macbeth, all come in night-scenes. The witches dance in the thick air of a storm, or, 'black and midnight hags' receive Macbeth in a cavern. The blackness of night [makes] the hero a thing of fear, even of horror; and that which he feels becomes the spirit of the play."–Quoted in Eastman, A.M., and G.B. Harrison, eds. Shakespeare's Critics: From Jonson to Auden. Ann Arbor, Mich.: U of Michigan, 1964 (Pages 238-239)

.

Shakespeare frequently presents images of blood in Macbeth. Sometimes it is the hot blood of the Macbeths as they plot murder; sometimes it is the spilled, innocent blood of their victims. It is also blood of guilt that does not wash away and the blood of kinship that drives enemies of Macbeth to action. In general, the images of blood–like the images of darkness–bathe the play in a macabre, netherworldly atmosphere. Here are examples from the play:

Come, you spirits
That tend on mortal thoughts, unsex me here,
And fill me from the crown to the toe top-full
Of direst cruelty! make thick my blood. (Speaker, Lady Macbeth: 1. 5. 48-51)

Is this a dagger which I see before me,
The handle toward my hand? Come, let me clutch thee.
I have thee not, and yet I see thee still.
.............................[ellipsis of seven lines]
And on thy blade and dudgeon gouts of blood,
Which was not so before. There's no such thing:
It is the bloody business which informs
Thus to mine eyes (Speaker, Macbeth: 2. 1. 44-60)

MACBETH...Will all great Neptune's⁷ ocean wash this blood
Clean from my hand? No, this my hand will rather
The multitudinous seas in incarnadine⁸,
Making the green one red.
LADY MACBETH...My hands are of your colour; but I shame
To wear a heart so white. (2. 2. 75-80)

To Ireland, I; our separated fortune
Shall keep us both the safer: where we are,
There's daggers in men's smiles: the near in blood,
The nearer bloody. (Speaker, Donalbain: 2. 3. 137-140)

The very title of Macbeth conjures up the dense, suffocating metaphoric climate of primeval evil, darkness, blood, violated sleep, and nature poisoned at its source."–Interpreting Literature. 4th ed. New York: Holt, 1969 (Page 854).

Critic Maynard Mack and psychoanalyst Sigmund Freud both noticed that Lady Macbeth resembles Eve in her eagerness to tempt Macbeth to eat of forbidden fruit (in this case, murder) and that Macbeth resembles Adam in his early passivity. Supporting their views are these two passages in Act 1, Scene VII, in which Lady Macbeth goads her wavering husband: 
.
.........First Passage: Lady Macbeth tells her husband it is cowardly to hesitate like a scared cat.
.
..................Art thou afeard
..................To be the same in thine own act and valour
..................As thou art in desire? Wouldst thou have that
..................Which thou esteem'st the ornament of life,
..................And live a coward in thine own esteem,
..................Letting 'I dare not' wait upon 'I would,'
..................Like the poor cat i' the adage? (1. 7. 45-51)
.
.........Second Passage: Lady Macbeth challenges her husband to be a man.
.
.................. What beast was't, then,
..................That made you break this enterprise to me?
..................When you durst do it, then you were a man;
..................And, to be more than what you were, you would
..................Be so much more the man. Nor time nor place
..................Did then adhere, and yet you would make both:
..................They have made themselves, and that their fitness now
..................Does unmake you. I have given suck, and know
..................How tender 'tis to love the babe that milks me:
..................I would, while it was smiling in my face,
..................Have pluck'd my nipple from his boneless gums,
..................And dash'd the brains out, had I so sworn as you
..................Have done to this. (1. 7. 55-67)

Imagery: Ambition

Raging ambition drives Macbeth to murder. After the witches play to his ambition with a prophecy that he will become king, he cannot keep this desire under control. He realizes that Duncan is a good king–humble, noble, virtuous. But he rationalizes that a terrible evil grips him that he cannot overcome.

..................                 I have no spur
..................To prick the sides of my intent, but only
..................Vaulting ambition, which o'erleaps itself
..................And falls on the other. (1. 7. 27-30)
 .

Macbeth was an 11th Century Scot who took the throne in 1040 after killing King Duncan I, his cousin, in a battle near Elgin in the Moray district of Scotland. Of his reign, Fitzroy MacLean has written the following: "Macbeth appears, contrary to popular belief, to have been a wise monarch and to have ruled Scotland successfully and well for seventeen prosperous years. In 1050 we hear that he went on a pilgrimage to Rome and there [lavished money to the poor]." (Work cited: MacLean, Fitzroy. A Concise History of Scotland. New York: Beekman House, 1970, Page 23.) In 1057, Duncan's oldest son, Malcolm, ended Macbeth's reign by killing him in battle and later assuming the throne as Malcolm III.

The Real Banquo

In Holinshed's Chronicles, the historical work on which Shakespeare based his play, the real Banquo is depicted as a conniver who took part in the plot to assassinate King Duncan. Why did Shakespeare portray Banquo as one of Macbeth's innocent victims? Perhaps because James I, the King of England when the play debuted, was a descendant of Banquo. It would not do to suggest that His Royal Majesty's ancestor was a murderer. 

Influence of Seneca

The Roman dramatist Seneca (4-65 A.D.), a tutor to Emperor Nero, wrote plays that described in elaborate detail the grisly horror of murder and revenge. After Elizabethans began translating Seneca's works in 1559, writers read and relished them, then wrote plays imitating them. Shakespeare appears to have seasoned Macbeth and an earlier play, Titus Andronicus, with some of Seneca's ghoulish condiments. 
.

Questions and Essay Topics
.
Questions for Discussion: (1) Murdering a king was considered an especially heinous crime in the aftermath of the Gunpowder Plot in England in November 1605. What was the Gunpowder Plot? (2) Did Shakespeare intend the witches to be symbols of something everyone faces–temptation? (3) The word fear occurs 48 times in Macbeth in noun and verb forms and as a root in words such as afeard and fearful. Which characters exhibit the most fear? What causes their fear? How does fear differ from guilt? (4) Julius Caesar, the title character of a Shakespeare play set in ancient Rome, was also a military commander, like Macbeth, who was consumed by ambition and died because of it. What other great leaders in history or fiction fell to ruin, or death, because of their ambition? (5) Lady Macbeth repeatedly washes her hands to expiate her guilt. In modern psychology, what is the term used to describe Lady Macbeth's disorder? If you were a psychologist–or a priest–what would you advise Lady Macbeth to do to unburden her conscience?
Essay Topics:  (1) Read the information under Theme 2 (above). Then write an essay about persons, places, things or ideas that appear "fair" when they are really "foul"–or appear "foul" when they are really "fair." (2) Lady Macbeth advises her husband to “Look like the innocent flower, / But be the serpent under it” (Act I, Scene V, Lines 66-67). Write an essay about things in the modern world that present themselves as "innocent flowers" even though they are really "serpents."

Facscinating Fact

The words blood and night (or forms of them, such as bloody and tonight) occur more than 40 times each in Macbeth. Other commonly occurring words that help maintain the mood of the play are terrible, horrible, black, devil, and evil.
.

.......The world of Macbeth is a world of contradiction. Good is bad. True is false. Light is dark. 
.......In the opening scene of the play, the three witches introduce the contrary nature of this world with two paradoxes. First, while ending a meeting, they agree to reconvene “when the battle’s lost and won” (1. 1. 7). Then they warn the audience that “fair is foul, and foul is fair” (1. 1. 14). In Scene II, the nobleman Ross informs King Duncan that a trusted lord, the thane of Cawdor, is a traitor who conspired with the enemy. In other words, the fair Cawdor is foul. After ordering Cawdor executed, the king confers his title on Macbeth, the hero of the battle. Macbeth, of course, goes on to commit an even more heinous crime, murder.
.......Why is the world of Macbeth topsy-turvy? Because it reflects the world at large as it really is–not a monolith of white or black but an amalgam of both. It is good and evil, innocent and guilty, honest and treacherous. It is a world of sun and clouds, of calm and storm, of cold and warmth. In Macbeth, Shakespeare holds up a mirror that reflects not only the outward substance of man but also his conflicting inner essence. This mirror reveals glory as blood-stained, safety as dangerous, friends as inimical.
.......In our own age, we can see the truth of Shakespeare’s thesis. For example, critics of the Iraq War say the U.S. won it but lost it, echoing the words of the witches. Clinton’s second term as U.S. president was fair (in terms of the economy) and foul (in terms of the sex scandal that led to his impeachment). And consider that it is sometimes the “upright” clergyman who swindles his TV viewers, the “caring mother” who drowns her children, the “harmless neighbor” who takes a gun to work and opens fire, and the “respected politician” who, though personally opposed to abortion, votes in favor of it. Fair is foul, and foul is fair.
.......When the witches predict that Macbeth will become king and that Banquo will beget a line of kings, both men react by speaking contradictions reflecting caution and confusion. Banquo says that 

           oftentimes, to win us to our harm,
The instruments of darkness tell us truths,
Win us with honest trifles, to betray ’s [betray us]
In deepest consequence. (1. 3. 134-137)

This supernatural soliciting
Cannot be ill, cannot be good:
..........................................................
If good, why do I yield to that suggestion
Whose horrid image doth unfix my hair
And make my seated heart knock at my ribs,
Against the use of nature? Present fears
Are less than horrible imaginings:
My thought, whose murder yet is but fantastical,
Shakes so my single state of man that function
Is smother'd in surmise, and nothing is
But what is not. (1. 3. 142-154)

................................Come, you spirits
That tend on mortal thoughts, unsex me here,
And fill me from the crown to the toe top-full
Of direst cruelty! make thick my blood;
Stop up the access and passage to remorse,
That no compunctious visitings of nature
Shake my fell purpose, nor keep peace between
The effect and it! Come to my woman's breasts,
And take my milk for gall, you murdering ministers,
Wherever in your sightless substances
You wait on nature's mischief! Come, thick night,
And pall thee in the dunnest smoke of hell,
That my keen knife see not the wound it makes,
Nor heaven peep through the blanket of the dark,
To cry 'Hold, hold!' (Act I, Scene V, Lines 43-57) 

Lechery, sir, it provokes, and unprovokes; it provokes the desire, but it takes away the performance: therefore, much drink may be said to be an equivocator with lechery: it makes him, and it mars him; it sets him on, and it takes him off; it persuades him, and disheartens him; makes him stand to, and not stand to; in conclusion, equivocates him in a sleep, and, giving him the lie, leaves him. (2. 3. 9)

What will you do? Let's not consort with them:
To show an unfelt sorrow is an office
Which the false man does easy. I'll to England. (2. 3. 134-136)

ROSS...Ah, good father,
Thou seest, the heavens, as troubled with man's act,
Threaten his bloody stage: by the clock, 'tis day,
And yet dark night strangles the travelling lamp:
Is't night's predominance, or the day's shame,
That darkness does the face of earth entomb,
When living light should kiss it?
OLD MAN...'Tis unnatural,
Even like the deed that's done. On Tuesday last,
A falcon, towering in her pride of place,
Was by a mousing owl hawk'd at and kill'd.
ROSS...And Duncan's horses–a thing most strange and certain–
Beauteous and swift, the minions of their race,
Turn'd wild in nature, broke their stalls, flung out,
Contending 'gainst obedience, as they would make
War with mankind.
OLD MAN...'Tis said they eat each other. (2. 4. 7-23)

What Was a Castle?

.......Many of the scenes in Macbeth are set in a castle. A castle was a walled fortress of a king or lord. The word castle is derived from the Latin castellum, meaning a fortified place. Generally, a castle was situated on an eminence (a piece of high ground) that had formed naturally or was constructed by laborers. High ground constructed by laborers was called a motte (French for mound); the motte may have been 100 to 200 feet wide and 40 to 80 feet high. The area inside the castle wall was called the bailey. Some castles had several walls, with smaller circles within a larger circle or smaller squares within a larger square. The outer wall of a castle was usually topped with a battlement, a protective barrier with spaced openings through which defenders could shoot arrows at attackers. This wall sometimes was surrounded by a water-filled ditch called a moat, a defensive barrier to prevent the advance of soldiers, horses and war machines. At the main entrance was a drawbridge, which could be raised to prevent entry. Behind the drawbridge was a portcullis [port KUL is], or iron gate, which could be lowered to further secure the castle. Within the castle was a tower, or keep, to which castle residents could withdraw if an enemy breached the portcullis and other defenses. Over the entrance of many castles was a projecting gallery with machicolations [muh CHIK uh LAY shuns], openings in the floor through which defenders could drop hot liquids or stones on attackers. In the living quarters of a castle, the king and his family dined in a great hall on an elevated platform called a dais [DAY is], and they slept in a chamber called a solar. The age of castles ended after the development of gunpowder and artillery fire enabled armies to breach thick castle walls instead of climbing over them.

Glossary of Animals and Animal Parts in Witches' Brew (Act IV, Scene I)

Adder’s Fork Forked tongue of an adder, a poisonous snake.
Baboon’s Blood Blood of a fierce monkey (genus, Papio) with long teeth.
Blindworm Legless lizard common in Great Britain. When fully grown, it is usually about a foot long. 
Eye of Newt Eye of a type of salamander (an amphibian with a tail) that spends part of its time in the water and part of its time on land. The young newt (larval stage) is called an eft. It is bright red with black spots. The adult newt is generally olive green with red spots circumscribed with black spots. In mythological tales, the salamander was a creature that was said to be able to live in fire.
Fillet of Fenny Slice of a snake that inhabits fens (swamps, bogs). 
Gall of Goat Gallbladder of a goat.
Lizard Reptile with four legs. Examples are the iguana, the chameleon, and the gecko.
Maw and Gulf of Ravined Salt-Sea Shark: Stomach of a hungry (ravined) shark.
Owlet’s Wing Wing of a baby owl. 
Scale of Dragon Scales (overlapping plates covering the body) of a dragon, a mythological flying reptile of gigantic size.
Tiger’s Chaudron Tiger’s intestines or guts.
Toad Hopping amphibian, resembling a frog, with short legs and rough skin. Unlike a frog, which has moist skin, a toad has dry skin. 
Toe of Frog Toe of an amphibian with webbed feet and strong hind legs for leaping. Unlike a toad, a frog has moist skin. 
Tooth of Wolf Fang of a wolf, a canine that lives in the wilds.
Wool of Bat Fur or hair of a bat, the world’s only flying mammal. A bat can weigh up to three pounds and fly at speeds up to 60 miles an hour. Although literature often portrays bats as sinister, evil creatures, they are beneficial to humankind because their insect diet eliminates many annoying–and dangerous–pests.
.

Notes

1. Cawdor: Village in the Highlands of Scotland, near Inverness.
2. Glamis: Village in the Tayside region of Scotland.
3. Wassail: Spiced ale.
4. Gorgon: Snake-headed monster in Greek mythology. Looking upon it turned the viewer to stone.
5. Avaunt: Go away; begone; get out of here.
6. Speculation: Ability to see.
7. Neptune: Roman name for the Greek sea god, Poseidon.
8. Incarnadine: Verb meaning to make something blood red.