Georges Thomas (?–1908), also known as Père Thomas, kept a small gallery that exhibited and sold contemporary art. He was one of the first people to sell the work of Henri de Toulouse-Lautrec. Vincent’s art was displayed in Thomas’s gallery, but as far as is known, none was sold. A few other small Parisian dealers, such as Julien Tanguy and Pierre Firmin Martin, also exhibited his work at the time.
Vincent called Thomas “half dealer, half collector” because he also bought art for himself; for instance, he purchased one of Émile Bernard’s paintings at the exhibition Vincent organised at Restaurant du Chalet. Vincent hoped to garner Thomas's support at a time when he still found it difficult to sell his art: while living in Arles, he repeatedly tried to persuade his brother to ask Thomas to advance money on presumed future sales.