Catalogue Raisonné of Intaglio Prints by Rosemarie L. Tovell. Montreal painter Clarence Gagnon (1881-1942) was a great traveller and man of the world, as well as one of Canada's great landscape artists. Since he divided his time between France and Canada, his works have been featured in many exhibitions in North America and Europe. This exhibition was the first retrospective since his commemorative exhibition in 1942.