The Compagnie de Ciment Unic Limitée was a Montreal company in the building-materials industry, active in the production and distribution of cement in Quebec. This certificate for 5 common shares, issued 21 April 1920 in the name of Anthime Desjardins, is the third appearance of this investor in our collection (see also the Dominion Brick Company and the Rideau Canal Supply Company). Anthime Desjardins thus emerges as a diversified Quebec entrepreneur and investor, active in several regional industrial sectors: building materials, canals, and supply. This portrait of a period investor, reconstructed through his various certificates, constitutes one of the most fascinating aspects of scripophily as a historical source. Quebec in 1920 experienced significant industrial growth, driven by postwar reconstruction demand.