Once in Aragon they rested in the Monastery of Santa María de Huerta, then in Aragon (although this is not the case today as the border was later moved). A group of followers came to join them there with fresh horses and, further on, a military escort. He demanded the judicial process known as "manifestación de personas", a form of habeas corpus which guaranteed his due process under the laws and justice of Aragon (fueros) and this was immediately granted. With this he could not be extradited to Castile without a formal judicial process. He then moved slowly towards Zaragoza while he raised his supporters. On May 1 he entered triumphantly in Zaragoza surrounded by his followers and escorts. There he was put in the prison of "manifestados" subject to the justice of Aragon which for him meant protection from the king and the judicial process in Castile. In the prison of "manifestados" Antonio Pérez had great liberty. He received his friends and prepared his defense. He had access to all his documents which had been sent to Aragón even before his escape.