Fußnoten:  [1]  Mud Snails in: The Vorpal Gallery: Yozo Hamaguchi. The Master of Mezzotint, New York, S.57. [2] Spiral Shell in: ebd. S.67. [3] ‚Shells', projet d`une Gravure in: Tokio Metropolitan Teien Art Museum: The Vorpal Gallery Collection of Mezzotints. Lithographs, Charcoal and Pastel Studies by Yozo Hamaguchi the Master of the Mezzotint, Tokio 1990, S.145.