The altus partbook of this set is at the British Library, and the Quintus is at Trinity College, Dublin. There is a second set kept at E.U.L Special Collections under the references Dk.5.14 and Dk.5.15, which contain the cantus and bassus partbooks. The altus of this other set is at George Washington University in the U.S, however the tenor and quintus partbooks do not survive.