There being five feet of the logs in the ground, the wall was, of course, twenty feet high.

This manner of enclosure was in some respects superior to a wall of masonry.

It was equally unscalable, and much more difficult to undermine or batter down.
The pen was longest due north and south.

It was divided in the center by a creek about a yard wide and ten inches deep, running from west to east.

On each side of this was a quaking bog of slimy ooze one hundred and fifty feet wide, and so yielding that one attempting to walk upon it would sink to the waist.