Wharton Esherick’s Studio. Photo by Charles Uniatowski, courtesy of the Wharton Esherick Museum. This story first appeared on Chadds Ford Live, one of our sister publications and was written by Rich Schwartzman. CHADDS FORD — The new Wharton Esherick exhibit differs from most exhibits at the Brandywine River Museum of Art (BRM). There are…