1946 cover from Revue Internationale de la Croix-Rouge (International Committee of the Red Cross Review), Genève. Franked 30c Helvetia (Rheinfall), tied by Genève cds (15.1.46), struck with the boxed "le marché noir nuit à tous" (the black market harms everyone) postwar rationing slogan cancel.
Addressed to Professor Gustave Roussy (1874–1948), Recteur of the Université de Paris (1944–47) and founder of the Institut du Cancer de Villejuif, which became the Institut Gustave Roussy in 1950 — today one of Europe's leading cancer centres. A notable-recipient cover combining Red Cross, WWII/postwar social history, and medical history interest.