By Gene Pisasale, Special to The Times A historic reenactor works on an 18th century loom, during a demonstration at the 2011 Chadds Ford Days, which take place Sept. 8 & 9. Photo courtesy of the Chadds Ford Historical Society. Local residents and visitors to the Brandywine Valley know it as the home of the famous Wyeth family of artists and picturesque countryside, but few know the history...