Shown at a terminal somewhere in the Pittsburgh area is Pittsburgh, McKeesport & Youghiogheny 2-8-2 No. 9558 of class H-8b. The H-8s all had 57-inch drivers, 26½x30-inch cylinders, and a steam pressure of 190 pounds per square inch. This class had a locomotive weight of 332,700 pounds and produced 59,690 pounds of tractive effort, to which a booster added 10,300 pounds. Their grate area was 60 square feet, with 4740 square feet of evaporative heating surface and 1085 square feet of superheating surface. Alco built all the H-8s between 1916 and 1920, with No. 9558's group being delivered in 1917. Some members of class H-8b saw further service in Mexico after 1945; No. 9558, however, was part of a group transferred to the Monongahela Railway in 1948, where she became No. 199. No data exists concerning the photographer's identity, but the Roman lettering for parent Pittsburgh & Lake Erie points to a date prior to 1940.