The Prince of Wales had at eighteen developed a will both resolute and impetuous, to which the death of a veteran statesman like Cecil was sure to have afforded freer scope. He did not disguise either his discontent at the policy of his father's favourite advisers, or his preference for ambitious projects such as Ralegh was known to cherish. Ralegh never had reason to doubt the sincerity of his admiration. There seemed no more ground for uncertainty as to the Prince's immediate influence on his behalf than as to the benefits to be derived from the youth's eventual accession to the throne. Henry was said to have extracted a promise from James of Ralegh's liberation at Christmas, 1612. November came, and the Prince lay dying of a raging fever. The Queen sent to the Tower for the medicine which had cured her. Ralegh despatched it with a letter, asserting that it would certainly heal this or any other case of fever, unless there were poison. A vehement debate followed among the Lords of the Council and the doctors, including the Genevese physician, Dr., afterwards Sir, Theodore Mayerne. Finally, the potion was administered. The patient, who had been speechless, revived sufficiently to speak. But it did not save his life. The populace and the Queen believed that it had been ineffectual because there had been poison. Forty years later, Carew Ralegh referred to the rumour as still credited. At the time it was repeated on the judicial bench. Sir Thomas Monson in 1615 was being tried for complicity in the murder of Sir Thomas Overbury. Coke, become Chief Justice, insinuated with his usual discretion and fairness at the trial that Overbury was poisoned from fear that he might, through hostility to Carr, divulge his guilty knowledge of a similar crime against 'a sweet Prince.'