Actual Location of Benwell swamp. Benwell swamp is located north of Township road 2. It is so named because the body of F. C. Benwell who was murdered was found there. The story of F. C. Benwell was typically told by teachers in the local Princeton school. The swamp itself is a large wetland area containing numerous water fowl, deer and bobcats. Occasionally  the tracks of cougars have been seen.