Natural History Part I - Mushrooms (No. VI). 1974. Lithograph in colors with helioprint, photochrome print and collage with color chalk. Bastian 47. Monogrammed and numbered as well with embossed Roman sheet number and copyright note. From an edition of 98 copies. On wove paper by Rives (without watermark). 75.8 x 55.8 cm (29.8 x 21.9 in), size of sheet. Printed by Matthieu Studio, Zurich-Dielsdorf (with blindstamp). [JS].