It was only for about a year that Carranza was able to devote himself to his diocese, where he bestowed especial attention upon the care of the poor. In 1558, in Antwerp he published, "Commentary on the Christian Catechism". A number of views suspected of heresy were found in the book, and the Grand Inquisitor Valdés brought an action against the author. Besides this work on the catechism, Carranza's manuscripts, expressions he had employed in sermons, and letters found in his possession, including one from Juan Valdés, the heretic, were taken as evidence against him. Melchior Cano, the famous theologian, and Dominicus de Soto, both members of the same order as the archbishop, drew numerous propositions from the commentary which were open to ecclesiastical censure. A Brief of Paul IV, dated 7 January 1559, had granted the Grand Inquisitor of Spain the power, for the space of two years, to investigate the conduct of all Spanish bishops; this measure was intended to counteract the threatening danger of the spread of Protestant doctrine. With the permission, therefore, of King Philip II (26 June 1558) the grand inquisitor had the archbishop arrested at Torrelaguna, 22 August 1558, and brought a prisoner to Valladolid.