Duke Humphrey of Gloucester is often given credit for the renaissance of English learning in the fifteenth century. It is true that the donations of books he made to Oxford, his patronage of English and Italian writers, and his patronage of administrators who had humanist training resulted in the transmittal of humanist values to England. But is it also true that these accomplishments were mainly the by-product of his self-aggrandizing style, rather than a conscious effort on the duke's part to promote learning. The duke, however, does deserve recognition for what he unwittingly may have done.

The present study reconstructs the musical milieu in which Vincenzo Ruffo's 1542 motet collection was conceived through an examination of the archival materials surviving from each of the major musical establishments known to be active in Milan 1535-1550. The relationship of the 1542 collection to Milanese musical activity. Its publication problems and its current position in source studies are then explored in light of the archival information that is currently available.