This indicates the dangerous tendency to extend inquisitorial activity beyond its original limits, and it is remarkable that a monarch entertaining these conceptions and engaged in the struggle with feudalism should not have frequently sought the assistance of the Holy Office. The only definite case that I have met with of its political use occurred in 1507, when Cæsar Borgia escaped from the castle of Medina del Campo to Navarre, and was made commander of his army by Jean d'Albret, whose sister Charlotte he had married. Ferdinand vainly endeavored to obtain his surrender and then caused a prosecution to be brought against him in the Inquisition for heretical blasphemy and suspicion of atheism and materialism. As Cæsar came to his death, March 12, 1507, while besieging the castle of Viana, which held out for Luis de Beaumont, and the prosecution was abandoned, we can only conjecture what the outcome might have been.[547] Navarre was also the scene of a trivial political use of the Inquisition in 1516, when, as we have seen (Vol. I, p. 227) it was instructed to ascertain the names of those friendly to Jean d'Albret. [Sidenote: _ANTONIO PEREZ_] There was evidently a purpose to use the Inquisition against the revolt of the Germanía of Valencia, when a brief of October 11, 1520, was obtained from Leo X, granting to Cardinal Adrian faculties to proceed against all persons conspiring against public peace. No use seems to have been made of this, but the Valencia tribunal had an opportunity of making itself felt towards the end of the disturbances. After Vicente Peris, the leader of the _Agermanados_ was killed in a tumult, March 3, 1522, a mysterious individual, known as _el Encubierto_, and variously described as a hermit from Castile and as a Jew from Gibraltar, presented himself as the avenger of Peris and became the spiritual chief of those who kept up the revolt in Játiva and Alcira. He assumed to be a prophet and the envoy of God, which brought him under the ordinary jurisdiction of the Holy Office, and it made record of the heresies uttered by him in a sermon preached at Játiva, March 23d. He organized a conspiracy in Valencia, but one of the accomplices, named Juan Martin, was betrayed and was seized, by the Inquisition. El Encubierto was assassinated, May 18th, at Burjasot, and his head was cut off; the corpse was brought to Valencia, where the inquisitors had it dragged through the streets on the way to the tribunal. He was condemned as a heretic, the headless body was relaxed and burnt and the head was set over one of the gateways.[548] The action of the Inquisition had no influence on the course of affairs, but it manifests the readiness of the tribunal to assert itself as a political force.