The first edition, first issue of Girolamo Ruscelli’s Ptolomaic map of the British Isles published in his edition of Ptolemy’s ‘Geographia’, 1561. The border contains figures of latitude and longitude, the ‘G’ in the corners most likely standing for the Latin ‘gradus’ for degrees. This map is one of two that were engraved on the same plate. Note how the plate mark runs off the top of the map. Girolamo Ruscelli (c.1504-66) edited the Latin text for this quarto edition of Claudius Ptolemy’s classic work ‘Geographia’ which included newly engraved copper plates engraved by the brothers Giulio (fl.1540-88) and Livio (c.1520-76) Sanuto. The work was published by Vincenzo Valgrisi in Venice. Provenance: Clive A. Burden Ltd.; private English collection. Nordenskiold (1979) 216; Shirley (1991) 67; Shirley (2004) T.Ptol 10a; Tooley’s Dictionary.