Rerum Omnium Perturbationem §23

²³ This work of spreading about leaflets, however, gradually decreased and ceased altogether when the people of these parts in large numbers began to attend his sermons. These leaflets, written by the hand of the holy Doctor himself, were lost for a time after his death. Later, they were found and collected in a volume and presented to Our Predecessor, Alexander VII, who had the happiness, after the customary process of canonization, of ascribing St. Francis first among the blessed, and later among the saints.