Source images IDS 17831 BCz, 242, p. 139-140, 144 (b.p.), p. 144 bp postscript (Latin office copy in secretary's hand) 
Facsimile of the source from the collection of Muzeum Narodowe w Krakowie, Biblioteka Czartoryskich, 242, p. 139-140, 144 (b.p.); copying, dissemination or publication in any form (including electronic) solely with prior written permission from the source's owner.