before jets, and when the 10 pm curfew was in effect, and only terminal A(not called A)there were mailboxes in the neighborhood of what is now marked as the USO club on the map. there was a door to the parking area, and the boxes were there. could also have been where the pedestrian walkway hits A.

the escalator was used to load the eastern shuttle of locheed electras.

there are at least 3 maildrops shown in the main terminals. check the map.