An original single-pen [one-room] log farmhouse is evident within the frame of what was apparently a slightly larger structure.
I have documented several other similar expanded houses, but this one offers a nice glimpse of the original, as the siding of the addition has been removed.
It’s truly an amazing survivor, likely dating to the late 19th century.
As the roofline and fireplace/chimney indicate, the expansion of the house was done relatively early in its history.
This view from the rear gives a better idea of the footprint of the original structure.