Purchased from Rosenbach, October 1923. Contemporary inscription on front cover: Bartholus Super ff. novo legacio magistri conradi Steyn utriusque juris doctoris ordinarii [?]canonici. Inscription on front pastedown: Ex legaus domini Conradi Steyn. Occasional contemporary ms. annotations and corrections. From the libraries of Leander van Ess, Sir Thomas Phillipps and Thomas FitzRoy Fenwick.