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Until 1940 Jos Mertens (1911-1964) was a freelance cartoonist for various newspapers and magazines and set designer for the Bouwmeester revue and the Italian opera. In 1940 he established himself as an independent artist in Leiden, and between 1940 and 1960 he made many trips through France, Italy, Spain, Morocco, Egypt, Russia, Poland and Greece. The art dealer/publicist Guus Maris published a monograph about the artist in which many photos of his special work.