He set about instructing the youth in the arts and graces appropriate to his pretended birth; but meanwhile a report having gained currency that the young earl of Warwick, son of Edward IV.'s brother George, duke of Clarence, had died in the Tower, Symonds decided that the impersonation of this latter prince would be a more easily credible deception.
The Yorkists had many adherents in Ireland, and thither Lambert Simnel was taken by Symonds early in 1487; and, gaining the support of the earl of Kildare, the archbishop of Dublin, the lord chancellor and a powerful following, who were, or pretended to be, convinced that the boy was the earl of Warwick escaped from the Tower, Simnel was crowned as King Edward VI.
It is probable that Symonds acted throughout with the connivance of the Yorkist leaders, and especially of John de la Pole, earl of Lincoln, himself a nephew of Edward IV., who had been named heir to the crown by Richard III.
A young Oxford priest, Richard Symonds by name, conceived the project of putting forward the boy Simnel to impersonate one of these princes as a claimant for the crown, with the idea of thereby procuring for himself the archbishopric of Canterbury.
About this time (1634) he met Joseph Symonds and Walter Cradock, two famous Nonconformists, whose piety and fervour influenced him considerably.