Portrait of Henry Grave, Portrait of Henry Grave in an architectural oval with border lettering. Below the portrait his family crest above a bas-relief with ships in a sea battle. In the foreground a helmet, books, a cannon and a banner, print maker: Jacob Houbraken, (mentioned on object), after painting by: Nicolaas Verkolje, (mentioned on object), Amsterdam, 1749 - 1780, paper, engraving, etching, pen, height 370 mm x width 237 mm, height 459 mm x width 292 mm.