By means of his spies, Henry, after a time, succeeded in tracing the true pedigree of Warbeck, and immediately published it for the satisfaction of the nation. At the same time he remonstrated with the Archduke Philip on account of the protection which was afforded to the impostor, and demanded that "the theatrical king formed by the Duchess of Burgundy" should be given up to him. The ambassadors were received with all outward respect, but their request was refused, and they were sent home with the answer, that "the Duchess of Burgundy being absolute sovereign in the lands of her dowry, the archduke could not meddle with her affairs, or hinder her from doing what she thought fit." Henry in resentment cut off all intercourse with the Low Countries, banished the Flemings, and recalled his own subjects from these provinces. At the same time, Sir Robert Clifford having proved traitorous to Warbeck's cause, and having revealed the names of its supporters in England, the king pounced upon the leading conspirators. Almost at the same instant he arrested Fitzwater, Mountfort, and Thwaites, together with William D'Aubeney, Thomas Cressener, Robert Ratcliff, and Thomas Astwood. Lord Fitzwater was sent as a prisoner to Calais with some hopes of pardon; but being detected in an attempt to bribe his gaolers, he was beheaded. Sir Simon Mountfort, Robert Ratcliff, and William D'Aubeney were tried, condemned, and executed, and the others were pardoned.
Stanley, the chamberlain, was reserved for a more impressive fate. His domestic connection with the king and his former services seemed to render him safe against any punishment; but Henry, thoroughly aroused by his perfidy, determined to bring the full weight of his vengeance upon him. Clifford was directed to come privately to England, and cast himself at the foot of the throne, imploring pardon for his past offences, and offering to condone his folly by any services which should be required of him. Henry, accepting his penitence, informed him that the only reparation he could now make was by disclosing the names of his abettors; and the turncoat at once denounced Stanley, then present, as, his chief colleague. The chamberlain indignantly repudiated the accusation; and Henry, with well-feigned disbelief, begged Clifford to be careful in making his charges, for it was absolutely incredible "that a man, to whom he was in a great measure beholden for his crown, and even for his life; a man to whom, by every honour and favour, he had endeavoured to express his gratitude; whose brother, the Earl of Derby, was his own father-in-law; to whom he had even committed the trust of his person by creating him lord chamberlain; that this man, enjoying his full confidence and affection, not actuated by any motive of discontent or apprehension, should engage in a conspiracy against him." But Clifford persisted in his charges and statements. Stanley was placed under arrest, and was subsequently tried, condemned, and beheaded.
The fate of the unfortunate chamberlain, and the defection of Clifford, created the greatest consternation in the camp of Perkin Warbeck. The king's authority was greatly strengthened by the promptness and severity of his measures, and the pretender soon discovered that unless he were content to sink into obscurity, he must speedily make a bold move. Accordingly, having collected a band of outlaws, criminals, and adventurers, he set sail for England. Having received intelligence that Henry was at that time in the north, he cast anchor off the coast of Kent, and despatched some of his principal adherents to invite the gentlemen of Kent to join his standard. The southern landowners, who were staunchly loyal, invited him to come on shore and place himself at their head. But the wary impostor was not to be entrapped so easily. He declined to trust himself in the hands of the well-disciplined bands which expressed so much readiness to follow him to death or victory; and the Kentish troops, despairing of success in their stratagem, fell upon such of his retainers as had already landed, and took 150 of them prisoners. These were tried, sentenced, and executed by order of the king, who was determined to show no lenity to the rebels. Perkin being an eye-witness of the capture of his people, immediately weighed anchor, and returned to Flanders.
Hampered, however, by his horde of desperadoes, he could not again settle quietly down under the protecting wing of the Duchess Margaret. Work and food had to be found for his lawless followers; and in 1495 an attempt was made upon Ireland, which still retained its preference for the House of York. But the people of Ireland had learnt a salutary lesson at the battle of Stoke, and Perkin, meeting with little success, withdrew to Scotland. At this time there was a coolness between the Scottish and English courts, and King James gave him a favourable reception, being so completely deceived by his specious story, that he bestowed upon him in marriage the beautiful and virtuous Lady Catherine Gordon, the daughter of the Earl of Huntly, and his own kinswoman. Not content with this, the King of Scots, with Perkin in his company, invaded England, in the hope that the adherents of the York family would rise in favour of the pretender. In this expectation he was disappointed, and what at first seemed likely to prove a dangerous insurrection ended in a mere border raid.
For a time Warbeck remained in Scotland; but when King James discovered that his continued presence at his court completely prevented all hope of a lasting peace with England, he requested him to leave the country. The Flemings meanwhile had passed a law barring his retreat into the Low Countries. Therefore, after hiding for a time in the wilds of Ireland, he resolved to try the affections of the men of Cornwall. No sooner did he land at Bodmin, than the people crowded to his banners in such numbers, that the pretender, hopeful of success, took upon himself for the first time the title of Richard IV., king of England. Not to suffer the expectation of his followers to languish, he laid siege to Exeter; but the men of Exeter, having shut their gates in his face, waited with confidence for the coming of the king. Nor were they disappointed. The Lords D'Aubeney and Broke were despatched with a small body of troops to the relief of the city. The leading nobles offered their services as volunteers, and the king, at the head of a considerable army, prepared to follow his advanced guard. Perkin's followers, who numbered about 7000 men, would have stood by him; but the cowardly Fleming, despairing of success, secretly withdrew to the sanctuary of Beaulieu. The Cornish rebels accepted the king's clemency, and Lady Gordon, the wife of the pretender, fell into the hands of the royalists. To Henry's credit it must be mentioned that he did not visit the sins of the husband upon the poor deluded wife, but placed her in attendance upon the queen, and bestowed upon her a pension which she continued to enjoy throughout his reign, and even after his death.
It was a difficult matter to know how to deal with the impostor himself. It would have been easy to make the privileges of the church yield to reasons of state, and to take him by violence from the sanctuary; but at the same time it was wise to respect the rights of the clergy and the prejudices of the people. Therefore agents were appointed to treat with the counterfeit prince, and succeeded in inducing him, by promises that his life would be spared, to deliver himself up to King Henry. Once a captive, he was treated with derision rather than with extreme severity, and was led in a kind of mock triumph to London. As he passed along the road, and through the streets of the city, men of all grades assembled to see the impostor, and cast ridicule upon his fallen fortunes; and the farce was ended by the publication of a confession in which Warbeck narrated his real parentage, and the chief causes of his presumption to royal honours.
But although his life was spared, he was still detained in custody. After a time he escaped from prison, and fled to the Priory of Sheen, near Richmond, where he desired the prior, who was a favourite with the king, to petition for his life and a pardon. If Henry had listened to the advice of his counsellors he would have taken advantage of the opportunity to rid himself of this persistent disturber of his peace; but he was content to give orders that "the knave should be taken out and set in the stocks." Accordingly, on the 14th of June 1499, Warbeck was exposed on a scaffold, erected in the Palace Court, Westminster, as he was on the day following at the Cross on Cheapside, and at both these places he read a confession of his imposture. Notwithstanding this additional disgrace, no sooner was he again under lock and key, than his restless spirit induced him to concoct another plot for liberty and the crown. Insinuating himself into the intimacy of four servants of Sir John Digby, lieutenant of the Tower, by their means he succeeded in opening a correspondence with the Earl of Warwick, who was confined in the same prison. The unfortunate prince listened readily