certificate of sale between hs trowbridge and j p n hanna this is a rectangular off white paper certificate of sale between hs trowbridge and j p n hannaobverse the certificate is dated febru 16 1875 in the top right corner the central printed text reads bought of j pn 2btwdxa.jpg from 休斯敦大学 certificate⏩网址：zjw211 com⏪ View Photo