[From The Old Rose Advisor
, by Brent C. Dickerson, p. 195:] Jean Sisley, who died last January 12, 1891, at Montplaisir-Lyon, at the age of 87. Born at Flessingue, Holland, in 1804, Jean Sisley later became a naturalized Frenchman; he was the nephew of the famous painter Jean Van Duel. Mons Sisley was one of the creators of the Lyon Horticultural Circle, of which he was General Secretary, and which has since become the Lyon Horticultural Association... [Sisley
developed at Lyon the first double white zonale pelargonium...]
[From The Graham Stuart Thomas Rose Book, pp. 318-319:] R. multiflora Thunberg About 1860 Jean Sisley of Lyon received from his son in Japan seeds of the wil R. multiflora of Thunberg, a strong climbing Rose with single white flowers, which was quite different from the Chinese Multiflora of gardens, which had pink or crimson double flowers. Guillot, the famous Rose breeder of Lyon, planted some of these Japanese Multifloras in his nursery, and in 1868 saved seeds from them... one of these had large, tinged white flowers with two rows of petals and produced good seeds, which were sown in 1872, and this produced in the second generation the first two Poly-Poms, 'Paquerette' and 'Mignonette'... Both were continuous in their flowering... 'Paquerette' was a pure white, while 'Mignonette' was rosy-pink and white; both combined the characters of multiflora and the 'Dwarf Pink China'
[From The Makers of Heavenly Roses, p. 24:] Jean Sisley [who befriended Henry Bennett was] an amateur rosarian and expert horticulturist... [he tried to] persuade the rose raisers of Lyon to adopt [more scientific methods of hybridization]... he was related to the Impressionist painter, Alfred Sisley...
[From an 1883 letter to the editor of The Garden: an illustrated weekly journal of gardening in all its branches, we know that Jean Sisley grew Rosa persica (under the name Rosa berberifolia) before 1883. At p. 214.