Another unified sermon collection made in the second quarter of the fifteenth century may be the work of a collector who is known to us by name and whose interests, as they are reflected in a number of manuscripts that he owned or wrote himself, included the collecting of sermons. John Dygon studied at Oxford, where he is attested as having earned bachelor degrees in both laws. He must also have incepted as a master, probably of Arts, because in several subscriptions he calls himself “M[agister].” From 1406 to 1435 he held appointments in several parishes in southern dioceses, the last one being St. Andrew's, Holborn, London. Then he was admitted as the fifth recluse to a cell at the recently founded Carthusian priory at Sheen in Surrey, where he lived from 1435 until at least 1449.

Dygon has left various owner's notes and subscriptions in a number of manuscripts, many of which he gave to Magdalen College, Oxford. The notes are all written in the same hand, and this has been identified as Dygon's. They can be separated into two types: in one, besides calling himself Magister, he titles himself only presbiter; in the other he also mentions that he is a reclusus at Sheen. If this distinction is meaningful, it indicates that books with the first form were owned and written before he entered the charterhouse. In this case, Dygon's activity of collecting books and writing them reaches back into his period as a parish priest.