WELLS, CAROLYN.At The Sign Of The Sphinx: A Book Of Charades. Duffield & Co., New York: 1906. h Hardcover, no dustjacket. Good condition considering its age. Back cover is slightly stained. "My first, what power and night are thine! Sometimes I think thou art divine: Titled and great! we often see." And so begins At The Sign Of The Sphinx: A Book Of Charades.