Hannibal and St. Joseph Railroad No. 570 to 573 were ordered originally as H&StJ 681 to 684. These were changed to KCStJ&CB, same numbers but, as the engines were to be used on the H&StJ, they were lettered with the initials of that road, and H&StJ 840 and 841 were ordered as H&StJ No. 686 and 687. These were changed to CB&KC, same numbers, but also lettered for the H&StJ. These changes were made at the Baldwin Works before the engines were delivered, which explains why the Baldwin Works issued a photograph of H&StJ 687 while the records show the engine to have been delivered under another number.

An interesting note about the Rogers Locomotive and Machine Works ( later, a subsidiary of Alco ); the Works did not have a direct rail connection. The nearest railroad was the Erie, about a mile from the factory. The finished locomotives were hauled through the city of Patersonn New Jersey, first on temporary tracks laid in the streets and pulled by teams of as many as 20 horses. Later, when streetcars were operating in Paterson, heavy flatcars were used, again using "horsepower".

The photograph was captioned as follows: Typical of the steam motive power housed at this tiny terminal was 2-6-0 Mogul No. 1261, here all steamed up in 1939 and awaiting departure time for a round trip over the branch with the daily except Sunday mixed train. A side-door caboose accommodated the infrequent cash rider.

See also: https://www.tampicohistoricalsociety.com/HYandT_History.html

Hol Wagner adds: I'm fairly sure the 1344 is simply doing one of its designed chores: shoving a tender, disconnected from its locomotive, into the Ottumwa roundhouse for repair or temporary storage while the locomotive was worked on. And the roundhouse is almost certainly at Ottumwa, the 1344 being assigned to the Ottumwa Division in 1914.