Some of Fallulah Brook begins in northern Fitchburg in a swamp and breakout zone between hills, curving around and down into the valley that feeds the reservoirs and that powered mills like the Fallulah Paper Company. I wonder where the name comes from? Anyway, here is a little piece of the swamp, just to give you an idea.
I wrote a bit about this area in previous posts. By the way there are a few more large and small mounds down where West Ashby Rd Crosses the main brook