Carlos then offers his petition that he may have the command of the army appointed to quell the insurrection in Brabant. He hopes much from the attachment of the Netherlands to him, and reasonably anticipates that his appearance in person, his dignity as crown prince, and the course of mildness and forbearance he proposes to pursue, may bring them back to their allegiance. The king intimates gloomily his suspicion that treacherous designs against his life are concealed under the philanthropic zeal of his son; Carlos is horror-struck and deeply wounded at the insinuation, but withdraws not his prayer, pressing it more earnestly again and again, in spite of the rising displeasure of the monarch. Philip haughtily and decisively rejects his suit, having bestowed the command upon Alba, and commands the mortified prince to remain in Spain; Carlos leaves the audience chamber, and the Duke of Alba entering receives the royal orders to prepare for his immediate departure to Brussels, to take his leave of the queen and the prince. The cautious courtier observes the emotion yet visible on the countenance of his master, and asks if it is caused by the subject of his conference with his son. Philip merely tells him the subject of their conversation was Duke Alba; and thus alarming his fears bids him seek a reconciliation with the prince, hinting darkly his doubts of the honesty and candor of the noble duke, who, troubled at this intimation, departs disconcerted.

The next scene takes place in an ante-chamber to the queen's apartment. Carlos is in conference with a page belonging to the queen, who has privately brought him a letter and a key. In a tumult of contending feelings, the prince breaks the seal, and at the same moment duke Alba crosses to the inner chamber. The letter is in a female hand, and appoints a meeting in a cabinet attached to her majesty's apartments, safe from intrusion, where the writer promises that “the reward of love” shall be bestowed. Carlos is ignorant of the queen's hand writing, but does not for a moment imagine the letter to be from any other than herself. In this supposition he is confirmed by the page, whom he knows to belong to Elizabeth, and who replies to his eager questions that the letter was given him by “her own hand.” The possessor of the hand is not named by either—and hence arises the mistake. The surprise and agitation of the prince are extreme; yet in the bitterness of a spirit wounded by unkindness, he does not hesitate to accept the bliss he fancies offered to him. Before he can escape from the ante-chamber, Alba enters and requests a conference. A long interview follows, which at length, in spite of the studied calmness of the duke, terminates in a dispute; both draw their swords, but are interrupted by the queen, who rushes from her chamber. The effect of her appearance is instantaneous; Carlos at a word of remonstrance from her, drops his sword, and embracing Alba asks his forgiveness. The queen, accompanied by the duke, returns into her closet.

We are next introduced into a cabinet, where the Princess of Eboli, fancifully dressed, is playing on the lute. She is enamored of the prince, and is anxiously awaiting the return of the messenger, by whom she despatched her letter. The page of the preceding scene appears—she starts up and hastily questions him; he relates the words and the emotion of the prince on the reception of the billet, and informs her that he may be momentarily expected. The boy is dismissed, and Carlos enters the cabinet by means of the key conveyed to him by the page. His surprise at finding himself alone with the princess of Eboli, his embarrassment, and efforts to explain his apparently unexpected appearance, are almost amusing. The graceful and animated conversation of the lady does much to remove the first awkwardness of his mistake, and he becomes insensibly interested, though quite unable to account for the apparent pleasure with which his fancied intrusion is received. The princess informs him of the king's design to bestow her hand upon Don Ruy Gomez, Count of Silva, and of her aversion to the match; and wishes to be guided by his counsel, which she asks as from a dear friend. Her sentiments on love excite the admiration of the prince, who nevertheless seems marvellously ignorant of the drift of all her intimations.

Princess of Eboli. Love is alone the price of love. It is
The invaluable diamond, which I give
Freely away—or else, forever hid,
Must bury—like the noble-hearted merchant
Who all unmoved by the Rialto's gold,
Or king's displeasure, to the mighty sea
Gave back his pearl, too proud to part with it
Below its price!

Again she fancifully styles the passion, or rather the charms which awaken it, “the sister hues of one divine beam—the leaves upon one lovely flower.” The prince is enchanted with her wit and beauty, and the crisis approaches.

Princess of Eboli. Long since had I departed from this court,
And from the world departed; buried me
Within the cloister's walls, but that one tie
Still held me back—one tie, that to the world
Binds me with force resistless. Ah! perchance
A phantom! yet so dear to me! I love;
And I am——not beloved.

Carlos. You are—you are!
Truly as God doth dwell in Heaven. I swear it—
You are—unspeakably.

Princess of Eboli. And dost thou swear it!
That was indeed mine angel's voice! Yes—yes!
If thou dost swear it—Carlos—then indeed
Do I believe——I am!

This avowal on the lady's part is understood; but the prince—though he opens his arms to receive her when in the transport of affection she throws herself into them—has no idea of returning in coin the love so unexpectedly offered to him. A sudden thought has struck him; it is no less than to make the enamored princess a confidant of his attachment to his mother-in-law. He does not dream of the existence of such a thing as feminine jealousy; but is proceeding, in accordance with his mad design, to acquaint her with his love for another, when she suddenly interrupts his communication by her exclamations of horror and surprise. The truth flashes upon her mind; and in an agony of shame she demands her key and letters. She had a few moments before shown him a letter to her from the king, which he retains in his possession. Carlos refuses to give up the letters, and leaves her to mortification and regret. Reasoning upon what she has seen and heard, she conjectures that the queen is her fortunate rival; nor can she imagine the love of the prince unreturned by its object, however elevated and passionless her royal mistress has hitherto appeared.

In the mean time, Duke Alba and Domingo are in conference. Alba relates his meeting and dispute with Carlos, the sudden change in his conduct at a glance from the queen, and his altered demeanor towards him. The cautious priest replies that he has long suspected the attachment hinted at, but uttered no suspicions so long as proof was wanting. Another incident is mentioned by the Duke; he had observed the countenance of the prince when he left his father,—it was sad and overcast, but in the queen's ante-room, mantled with an expression of triumphant joy. He had even expressed satisfaction at the appointment of Alba to the command of the army to the Netherlands. The Duke himself is disposed to consider this appointment more of a banishment than a mark of favor. The two artful courtiers arrange a plot for the ruin of the prince, who is hateful to both on account of his independent spirit, and dreaded by reason of his right to the crown. Both agree that the suspicions of the king must be awakened; but to the fulfilment of their plans there wants one ally, the Princess of Eboli, who is beloved by the king. At this moment she appears; Alba retires, and she directs the priest, who had been the bearer of the king's letter to her, to signify to Philip her readiness to receive him. Her insinuations against the honor of the queen, and vows that she will expose her to the wrath of her husband, are answered with joy by Domingo, who calls the Duke to confirm their league. It is agreed that the princess shall first accuse the queen; as her majesty's companion and confidant her testimony will be accepted. Domingo suggests ingenious means of proof, and Alba mentions the page he had seen in close conversation with Carlos; but Eboli, alarmed, diverts their suspicion by hastily assuring them that no weight is to be attached to such evidence.