He had convinced the Holy Roman Emperor that he was the rightful King of England. He watched from his ship as the men of Kent lured his soldiers ashore with friendly words and killed them on the beach. He never set foot on English soil.

He called himself Richard of Shrewsbury, Duke of York, the younger of the two princes who had vanished into the Tower in 1483. His story was that his brother Edward V had been murdered on their uncle's orders but that he himself had been spared by a killer with a conscience, smuggled abroad, and raised in secret until he was old enough to reclaim what was his.

Nobody could prove the story was false, because nobody in England could say with certainty what had actually happened to the boys in the Tower. That uncertainty was a crack running through the foundation of Henry VII's throne, and for eight years Perkin Warbeck lived inside it.

Margaret of Burgundy received him at her court in Malines. She was Edward IV's sister, and she gave the young man a household, an honour guard, and access to every court in Europe that mattered. Whether she believed he was truly her nephew or simply understood the value of pretending to, the effect was the same. Emperor Maximilian received him in Vienna in 1493, walked beside him as a friend, and recognised him as Richard IV of England. He attended the funeral of Maximilian's father dressed in mourning as a king. The King of France received him. Money followed the recognition.

By the time he turned his attention toward England, Perkin Warbeck had been treated as a monarch by men who commanded armies Henry Tudor could not match.

Henry already knew what was coming. His agents had worked their way into Warbeck's court at Malines and reported everything back to London. Sir Robert Clifford, one of the conspirators inside England, was turned for five hundred pounds and gave up the names of the men who had promised to rise for the pretender. Sir William Stanley, Henry's own Lord Chamberlain, the man who had found Richard's crown on the battlefield at Bosworth and put it in the hands of the new king, was arrested and executed in February 1495 for saying he would support Warbeck if the claim proved genuine. The network inside England was dismantled before a single invasion ship left the Continent. Henry's spies had done their work months in advance.

The men sailing toward Kent did not know that the country they were sailing to had already been swept clean of the help they were counting on.

Fourteen small ships dropped anchor off Deal on the third of July 1495. Fifteen hundred men crowded their decks, many of them Continental mercenaries hired for a fight they did not fully understand. The Kentish men who watched them approach from the shore had already decided, on their own judgment, that this pretender came to plunder the country rather than free it. They did not raise the alarm. They did not simply refuse him. Hall's Chronicle records what they did instead: they lured his soldiers off the ships with fair promises and friendly words, drew them onto the beach, and then surrounded and killed them. One hundred and fifty men died in the sand at Deal. One hundred and sixty more were taken alive.

Perkin Warbeck, the man who had been received as a king in Vienna and mourned an emperor's father in royal black, stayed on his ship and watched it happen from the water. He gave the order to withdraw. Henry VII was in Lancashire that week, visiting his mother at her house, entirely absent from the coast his enemy had chosen to invade.

The prisoners were marched to London railed together in ropes, like horses drawing a cart, and paraded through the streets before their trials. Some were hanged along the Kent coast where they had been captured, as a visible warning to the towns that had watched the killing on the beach. Others were taken to London for execution. Warbeck did not wait to share their fate. He sailed first to Ireland, where the Tudor claim had never sat comfortably, and found no army willing to make his case for him there either.

From Ireland he sailed to Scotland, where James IV gave him something no English shore had offered: a welcome. James received him at court, granted him a pension, and gave him a wife, Lady Katherine Gordon, a cousin of the Scottish crown. The man who had failed to walk onto an English beach was married into Scottish royalty within the year, still calling himself a king with nothing beneath him but another monarch's patience.

That patience did not last. Warbeck's later landing in Cornwall in 1497 ended in surrender rather than slaughter, and Henry, for a while, kept him alive and half-forgiven at court, a curiosity more than a threat. The forgiveness did not hold. Warbeck was accused of plotting an escape from the Tower, tried, and hanged at Tyburn on the twenty-third of November 1499.

He had spent eight years welcomed at the courts of emperors and princes as Richard IV of England, and married to a king's cousin. Yet on the third of July 1495, the first day that he had the chance to step onto the soil of the country he claimed to rule, he stayed on his ship and watched his men die on the beach without him.