Prosper-Émile Weil was a chief doctor at Hôpital Tenon in Paris. he was also the husband of Juliette Schloss and brother-in-law of the children of Adolphe and Lucie Schloss.

Dr. Weil used his connections to the Banque Jordaan, headquartered in Paris with a storage facility at the Château de Chambon (Laguenne, Corrèze), to facilitate the transfer of the Schloss collection to Laguenne, a safe place away from any potential hazard created by military conflict.