CAPTION: W. J. Thubron, driving Frank Dohrman's horse, "Chance," won two out of three heats against Harry Darlington's champion, "Cephus," before 3,000 spectators. The race was in Ridge Ave., from Stockton Ave. to Galveston St. NOTES: PHOTOGRAPHER: Frank E. Bingaman. DATE: HEADING: Pittsburgh. Districts. North Side. #: From the Collections of the Pennsylvania Department, The Carnegie Library of Pittsburgh: Bingaman Collection.