Long Cemetery is tied to the Delaware legend of Catman, a former cemetery caretaker said to keep watch over the grounds after death. Versions of the ritual involve knocking three times and later having car trouble, but these are local ghost stories rather than verified events, and some older descriptions no longer match what visitors report at the site. Treat it as a cemetery first: visit only when permitted and do not disturb graves or structures.
Filed under folklore: stories a place tells about itself, passed down and still repeated.