Peoria & Eastern 2-8-2 No. 37 was a member of class H5o, outshopped by Alco in 1914 and 1915. Their dimensions were identical to the H5L class, described in connection with 2-8-2 No. 31. According to the 1940 New York Central System roster, the P&E had 17 Mikado type engines, all erected by Alco and none built later than 1917. The Peoria & Eastern was the New York Central's connection to "The Peoria Gateway," an extension into Corn Belt country that seemed to be forgotten in the assignment of modern motive power until the diesel era.