I've found some pretty wierd things in attics, sealed walls, and the like through the years. To wit:
. An elephant foot (yes, real) hollowed out like a bucket in my friend's attic after he'd lived there 15 yrs.
. The address of the Prime Minister of England ("#10 Downing St") written on the inside of a wall in 3' letters.
. An "RG22" pistol made mostly of pot metal that shot as much lead out the sides of the cylinder gap as the barrel (found in a wall)
. While working in Movieland Wax Museum, a spare WC Fields head rolled off a shelf and hit me when I bumped into the attic wall accidentally. (This REALLY unnerved me)

I'll bet some of you have found some odd things as well. Care to share?