On 18th May 1852 Gustave-Claude-Etienne Courtois was born in Pusey, Haute-Saône. His mother was unmarried.
1890. Gustave-Claude-Etienne Courtois [aged 37]. Study.
1891. Gustave-Claude-Etienne Courtois [aged 38]. Portrait of Virginie Amélie Avegno "Madame Gautreau" [aged 31].
Before 1923. Gustave-Claude-Etienne Courtois [aged 70]. "Young Florentin Playing with Cats".
On 23rd November 1923 Gustave-Claude-Etienne Courtois [aged 71] died.