The secret preliminaries only preceded the definitive treaty of peace, which was concluded at Cambray on the 8th of April, 1559. Mary, Queen of England, died during the interval, and Philip II., being then a widower, and only thirty-two years of age, while Don Carlos was scarcely fourteen, Henry II. thought it better to marry his daughter to the king. The marriage of Isabella to Philip was therefore agreed upon in the twenty-seventh article, and the secret article in the preliminaries was not mentioned. The marriage was celebrated at Toledo, on the 2nd of February, 1560. The general Cortes of the kingdom was then held: the members took the oaths of fidelity to Don Carlos, and acknowledged him as the successor to the crown, on the 22nd of the same month. The young queen could not attend this ceremony, as she was attacked by the small pox a few days after her marriage. Don Carlos had also fallen sick of the quartan fever, some time before the arrival of the queen in Spain. Although this disorder did not prevent him from riding on horseback, and attending at the assembly of the Cortes, it appears, from contemporary writers, that it rendered him thin, weak, and pale. This circumstance makes it improbable that he was handsome, and renders the journey which Mercier pretends that he made to meet the queen at Alcala extremely doubtful. When she became convalescent, Isabella must certainly have been made acquainted with the neglected education of Don Carlos, his bad principles, and his insupportable pride. She could not be ignorant how ill he treated his attendants; that when he was angry he broke anything he could seize; and she was probably informed of his behaviour to the Duke of Alva, at the assembly of the Cortes. The duke had the entire regulation of everything relating to the ceremonies, and was so much occupied, that he forgot to attend Don Carlos when he ought to have taken the oath of fidelity. He was sought for, and found, but the young prince was furious, and insulted him so grossly, that he almost made him forget the respect which was due to him. The king compelled Don Carlos to make an apology to the duke; but it was too late, they hated each other mortally all their lives.