Nearly all of the doors inside Pugsley are of the exact same construction: four-panel wood doors ranging from 1-1/8" to 1-1/4" in width. One side is trimmed out with a nice trim around the panels, usually the side facing out of the room. So, for example, here are two bedroom doors in the upstairs, both of these shots are taken from the hallway side.
Mortise locks had been made in England since around 1790, but were not largely used in America until 1840s. This was due to the narrow thickness of the doors in the majority of Colonial period houses. Being 1¼” or less, the doors could not be cut out or mortised to accept such locks. These thin doors were usually equipped either with surface mounted thumb latches, spring latches, or rim locks. Then during the1820s/30s, common interior doors started to become thicker (1½”, 1¾”, 2"), which allowed them to accommodate a mortise lock or latch.
Thank you to the reader who asked for this info, as this is another piece of evidence dating our house to the 1830's. If more specific close-up detail is needed, please just ask!