"Gagneur, Louise, a French novelist; born in Domblans, France, in 1832. At 18 she wrote an essay on trades-unionism which attracted the attention of Vladimir Gagneur, a deputy in the Chamber, who married her. She wrote novels of a socialist and anti-Catholic tendency, many of them which proved popular; among them An Expiration (1859), The Black Crusade (1865), The Story of a Priest (1882), The Crime of the Abbé Maufrac (1882) and An End of the Century Devotee (1891)"
University Encyclopedia 1902
The Nihilist Princess by Louise M. Gagneur