Early in August that search took place, and Ward went carefully over the walls of every room sizeable enough to have been by any possibility the library of the evil builder. He paid especial attention to the large panels of such overmantels as still remained; and was keenly excited after about an hour, when on a broad area above the fireplace in a spacious ground-floor room he became certain that the surface brought out by the peeling of several coats of paint was sensibly darker than any ordinary interior paint or the wood beneath it was likely to have been. A few more careful tests with a thin knife, and he knew that he had come upon an oil portrait of great extent. With truly scholarly restraint the youth did not risk the damage which an immediate attempt to uncover the hidden picture with the knife might have done, but just retired from the scene of his discovery to enlist expert help. In three days he returned with an artist of long experience, Mr. Walter C. Dwight, whose studio is near the foot of College Hill; and that accomplished restorer of paintings set to work at once with proper methods and chemical substances. Old Asa and his wife were duly excited over their strange visitors, and were properly reimbursed for this invasion of their domestic hearth.