Painted in late June, 1890.
On October 7, 2005, it was announced that Stephen Wynn had sold the painting, along with Gauguin's Bathers, to Steven A. Cohen for $100 million. (http://www.tfsimon.com/auvers-sur-oise.html)
Here are three sketches - one of a peasant woman, big yellow hat with a knot of sky-blue ribbons, very red face, rich blue blouse with orange spots, background of ears of wheat. It is a size 30 canvas, but I'm afraid it's really a bit coarse. (http://www.tfsimon.com/auvers-sur-oise.html)