641. Harvard University, MS Richardson 16 Title: De instruendis aciebus Author: Aelianus Tacticus Date: ca. 1480
643. Harvard University, MS Richardson 10 Title: Book of hours Author: Catholic Church Date: ca. 1515
646. Harvard University, MS Richardson 12 Title: Astrological text Author: Pseudo-Dionysius the Areopagite Date: 1436.