trained as a mycologist ; self-taught free-lance artist and illustrator
Italy
Maurice Roch & C. P.: Médecine & Champignons vénéneux (Basle 1942, with 16 coloured plates, translated into 10 languages) ; Champignons montagnes, Revue Alpine Intern. 16 (1958): 15-9 ; A. Duperrex, C. P. & R. Dougoud: Nos Champignons (1958 ; Unsere Pilze ;
in Geneva, C. P. was the official inspector of mushrooms
botanical and mycological pen-and-ink drawing, and watercolour ; painting on emaille
