The dating of old houses : a paper read by Dr. Henry C. Mercer, of Doylestown, Pa., at a meeting of The Bucks County Historical Society, at New Hope, Bucks County, Pa., Oct. 13, 1923
A picture story of the house of Derr [Pennsylvania's contribution to a world of primitive art; a true story of three brothers, Peter, John, and Joe Derr in the Summer Hills of Berks County, Pa