Stan V. Henkels conducted auctions of books and related material in Philadelphia for over 30 years, from the 1880's to the 1920's. At various times he was associated with different auction rooms. In the 1890's he worked from the auction rooms of Thomas Birch's Sons, by the turn of the century he was at Davis & Harvey's Auction Rooms, and 1908 found him conducting auctions at Freeman's. By 1913 Henkels was operating independently, as he would continue for most of the remainder of his life.

We have placed all of the auctions conducted by Stan Henkels under the source of Stan V. Henkels, rather than under the names of the various firms with which he was associated, so that all of the auctions he conducted can be located together.