Clay Slate Height of sculpture: 53 cm Signature undetected   Provenance: important private collection   Comparative literature: - Vojtěch Lahoda, Emil Filla, Praha 2007, page 443, pic. no. 480 - Emil Filla (1882-1953), Národní galerie v Praze 2007 - Emil Filla, sochař, exhibition catalogue, Severočeská galerie výtvarných umění v Litoměřicích 2002 - Emil Filla, Melantrich, a.s. v Praze 1938   Confirmation of authenticity by Professor Jiri Setlik attached. Expertise by Professor Jaromir Zemina attached.   A sculpture by Emil Filla of comparable quality has never been auctioned on the Czech market before.