drawing by pen and pencil on the menu of the Dubonet restaurant in Prague on September 23, 1975 cut out a passe-partout: 17 x 25,5 cm signed and dated lower right: "KL 75." verso confirmation of authenticity by Dr Frantisek Dvorak, in Prague on 11 May 2007.   Provenance: significant Prague collection   Confirmation of authenticity by Kamil Lhotak Jr., the author's son attached and the copyright holder of the painter.    Consulted with Professor Jaromir Zemina, Dr Karel Srp, Dr Jiri Machalicky, Aneta Kopecka and Vladimir Lekes.