This weekend I got bored, and drove down to Franklinton to see what was doing around the old Deardurff House, the oldest standing log structure in Columbus (it dates from perhaps 1807 or so). Log post office is a bit of a stretch: postmasters before the 1840s were simply local citizens who got an appointment from the government, and then received letters at a store or tavern.
It looks as if the owners have taken off much of the siding (the house was occupied until the 1960s!), so at this point you can see the wood siding, the logs underneath, and a bit of the interior lathing between the window and door on the first floor. Hopefully gutting is the first step to a speedy reconstruction!