By the year 1940, most railroads had forgotten about the 4-4-0, but the Pennsy, the Boston and Maine, and Canadian Pacific Railway, among others, were still using them.
PRR S1 | PRR L1s | PRR K4s | PRR E6 | PRR GG1 | PRR MP54 | PRR E44 | PRR DD1 | PRR D6 | PRR 3750 | PRR 1361 |