STC310983 A draughtsman taking details for a portrait, using a perspective apparatus for drawing onto glass, from \'Course in the Art of Drawing\' by Albrecht Durer, published Nuremberg 1525 (woodcut) (see also 237095) by D羹rer or Duerer, Albrecht (1471-1528); Private Collection; (add.info.: Details would be later transfered onto wood or canvas in the studio; device also used by Alberti, Leonardo da Vinci and Bramante;); The Stapleton Collection; German, out of copyright.