The nomination form for the Plymouth Center Historic District lists the house at 717 Main Street as a former ell of the Curtiss Hotel, known as the Quiet House. It gives a date of c. 1860, but I’m not sure if this is the date the ell was constructed or he date it was removed to become a separate house. It was the home of Caroline P. Root. Her son, Edward Root, lived with her. He was a carriage painter.
Caroline P. Root House (1860)