Sisley did not live to see his talent recognized, however, a year after his death, his painting "Flood at Port-Marly" (Orsay Museum - Paris) reached a high bidding.
Sisley was exclusively a landscape painter, who, in the line of Camille Corot, and with Claude Monet, best sought and succeeded in expressing the most subtle nuances of nature in Impressionist landscapes.  He exhibited with the Impressionist group in 1874, 1876, 1877 and 1882.
In 1868, Alfred Sisley's landscape "Avenue of Chestnut Trees near La Celle Saint-Cloud (Southampton)" was shown at the prestigious Salon art exhibition at Paris. 
Flood at Port-Marly
The flood of 1876 at Port-Marly, France, became the subject of a large series of his landscapes
He painted 7 canvas on this event.