Warbeck first claimed the English throne at the court of Burgundy in 1490, where jeton coins were minted for him. Warbeck explained his (i.e. Richard of Shrewsbury's) mysterious disappearance by claiming that his brother Edward V had been murdered, but he had been spared by his brother's (unidentified) murderers because of his age and "innocence". However, he had been made to swear an oath not to reveal his true identity for "a certain number of years".Weir, Alison, pp. 238–240 He claimed that from 1483 to 1490, he had lived on the continent of Europe under the protection of Yorkist loyalists, but when his main guardian, Sir Edward Brampton, returned to England, he was left free. He then declared his true identity.
Warbeck first claimed the English throne at the court of Burgundy in 1490 where jeton coins were minted for him Warbeck explained his (ie Richard of Shrewsbury's) mysterious disappearance by claiming that his brother Edward V had been murdered but he had been spared by his brother's (unidentified) murderers because of his age and "innocence" However he had been made to swear an oath not to reveal his true identity for "a certain number of years"Weir Alison pp 238–240 He claimed that from 1483 to 1490 he had lived on the continent of Europe under the protection of Yorkist loyalists but when his main guardian Sir Edward Brampton returned to England he was left free He then declared his true identity