I have not updated the reconstruction of the Old O'Fallon Mo Fort Zumwalt in a while.
This first photo is of the fort in the late 19th century and this is how it looked at it's most complete.
The old stone fireplace was all they left and it stood for many years. But it finally came down also.
It is really hard to join two cabins together that are not built at the same time, and this would not be a preferred method.
They are doing it this way to replicate the original.
There is probably a good reason the original builders built it like this.
One reason would be shortage of man power, so short logs were used to make it easier for just a couple people and a horse to do the work.
The walls are not as high on this side, so we can see the floor joins a little better.
Notice the shelf built into the fireplace to help support that first log.
You can also see the tongue running up to the first complete log. It would be notched into the bottom of that log.
South side wall.
Note the tongue on the first log.