1. Jewish Theological Seminary of America, RB409:13-14 DS ID: DS16328 Title: Letter Author: Hugh Broughton Place: London Date: 1590.
2. Columbia University Rare Book & Manuscript Library, MS X893.19 K71 no. 21 DS ID: DS18729 Title: Letter and Hebrew text Author: Karasik, Ber, active 19th century Place: Ukraine Date: 1865.