1. University of Pennsylvania, LJS 211 DS ID: DS105 Title: Deed Author: Roger Bigod, 2nd Earl of Norfolk Date: ca. 1201-1205.
2. University of Pennsylvania, Ms. Coll. 742 Folder 5 DS ID: DS1880 Title: Legal document Author: Ildibrandinus Date: 1251.
3. University of Pennsylvania, Ms. Coll. 742 Folder 8 DS ID: DS1913 Title: Family documents Author: Piccolomini Date: 1278.