 In 1602 he was guardian of the convent of Tulancingo.Then, in 1603, he was elected guardian of the convent of Santiago Tlatelolco, taking up his post there on 22 July; a post he held, it seems, for eight and a half years.While guardian of the convent at Tlatelolco, he assumed numerous heavy burdens, both intellectual and practical, not all of which related to the affairs of the Franciscans.