Inscribed: Recto: in block, at lower left: "Zustus Verus pinx."; in block, at lower right: "J:B:J sculp: et exc."; Verso: at botton center, in graphite: "Cha 1 - Ch 7"; at bottom center, in black ink: "This is a very scarce portrait of Algeron Sidney / J. B. Jackson [indecipherable] went to Venice where he worked / at his chiaroscuro prints. This is probably executed after his [indecipherable] trip to England about 1740."