Ren� Vallery-Radot was a French writer who was born in Paris on October 1, 1853 and died there on January 24, 1933. He was also the son-in-law of Louis Pasteur, on whom he published the first biography. He was born in Paris, France, to Vincent-Felix Vallery-Radot (1814-1876), a journalist, Louvre librarian, and French politician, and his wife Rosella Guiard (1826-1916), the niece of novelist Eug�ne Sue and Gabriel-Marie Legouve, a member of the French Academy. He attended the College de l'Immaculee-Conception at Vaugirard, where he met Louis Pasteur's son, Jean-Baptiste Pasteur, and later studied law at the University of Paris. In 1876, he was appointed secretary to Fran�ois Buloz, director of the Revue des Deux Mondes. Between 1874 and 1878, he wrote two works. In 1879, he was appointed secretary to Charles de Freycinet, Minister of Public Works, Foreign Affairs, and finally Prime Minister. On November 4, 1879, he married Louis Pasteur's daughter, Marie-Louise, and they had two children, Camille (1880-1922) and Louis.
