Every post in this category, newest first, grouped by year.

1
Owney, the dog who rode the mail trains
A stray dog wandered into the Albany post office in 1888 and became the unofficial mascot of the railway mail clerks.
A post office on a Boston streetcar
Mail by rail
4
A post office on a Boston streetcar
Railway Post Office streetcar 642 ran between Charlestown and Post Office Square.
Inside a Boston mail streetcar
Mail by rail
10
Inside a Boston mail streetcar
The interior of a Boston mail streetcar equipped with a canceling machine, about 1899.
Railway Post Office car number 488
Mail by rail
11
Railway Post Office car number 488
A Pullman-built baggage and Railway Post Office car from the Central of Georgia line, about 1916.

12
Sorting mail in the tight quarters of an RPO car
Railway Post Office clerks at work inside a Railway Post Office car, about 1920.
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