From Russian origins, Leo-Herrmann had some difficulties to be awarded French citizenship. The 1893 census shows his presence in Ecouen.
The two Leo-Herrmann favorite topics were the church officials (he treated this subject with a lot of humor) and the “Incroyables” (French revolutionary men) from the beginning of the 19th Century. He exhibited at the 1876,1884 and 1895 Salons de Paris.
He lived in Ecouen, “rue de Paris” (Paris street) in a house called “Villa Gabrielle” belonging to Charles Edouard Frere. It was rented verbally, according to the local usages, for the amount of 1500 F a year. Because he was not paying the rent, he has been expelled and condemned to pay for the total late amount.