W. Hamilton Gibson,
Camp Life in the Woods and the Tricks of Trapping and Trap Making
“ Happily we have no tigers in the United States, but the puma and the lynx are both fit subjects for the pit-fall. These animals cannot be said to exist in such numbers as to become a scourge and a stranger to the inhabitants of any neighborhood, and for this reason the "Moat" arrangement of the pit-fall is not required. The simple pit is often used, and when properly constructed and baited is a very sure trap. The hole should be about twelve feet in depth and eight feet across, widening at the bottom. ”
