L'Heureux contributed to documentary photography in the 19th century through her portraits of residents and landscapes of Quebec.

[3] He followed in his parents' footsteps, traveling throughout Quebec taking landscape photos and outdoor group portraits.

After she and Bienvenu entered into their partnership, the business expanded to include cartes de visite and landscapes in addition to portraits.

Many of the studio's works are now owned by the Musée national des beaux-arts du Québec.

[8] L'Heureux employed photographic techniques including daguerrotype and collodion, or "wet-plate", process and stereoscopy.