A couple of weeks back a guy I know called to see if he could bring some guns out for some help in pricing. One of the guns was a Trapdoor rifle that had been polished and blued, and the stock had been sanded and varnished. He thought it might be the prize of the guns that his father had owned. I broke the news to him that the collector value of the TD had been ruined. A few days later he sent me a book that is a compilation of the serial numbers and features of the TD's sold by Turner Kirkland. It appears that when you bought one of his rifles you received a book of all the TD's with your serial number in the front of the book.