Born in Nantes to a French father William Henri Arnous-Rivière and an English mother Marie Tobin, he awarded himself the nobiliary particle "de". Arnous-Rivière finished 6th of 13 in the 1867 Paris international tournament organized in conjunction with the Exposition Universelle. Although he finished well below the strongest foreign masters, he was ahead of fellow Parisian, Polish-born, Samuel Rosenthal. Arnous-Rivière had success in some minor tournaments in Paris: 3rd in 1880, 2nd= in 1881, 2nd in 1882–3, and 3rd in the Café de la Régence tournament of 1896.