Page:The Lady Poverty - a XIII. century allegory (IA ladypovertyxiiic00giovrich).pdf/41

 famous work ("too famous," it might justly be called), finished in 1305, is the first writer who expressly mentions the "Sacrum Commercium," and he ascribes it merely to "a certain holy doctor," giving no name. Now Ubertino well knew Giovanni (ob. 1289), and it seems impossible that he should not also have known and celebrated the Blessed as the author of the "Sacrum Commercium" had he really