This is a mistake.
There is an interesting cave a mile or two below Hannibal, among the bluffs.

I would have liked to revisit it, but had not time.

In my time the person who then owned it turned it into a mausoleum for his daughter, aged fourteen.

The body of this poor child was put into a copper cylinder filled with alcohol, and this was suspended in one of the dismal avenues of the cave.

The top of the cylinder was removable; and it was said to be a common thing for the baser order of tourists to drag the dead face into view and examine it and comment upon it.
===12 LIFE ON THE MISSISSIPPI BY MARK TWAIN Part 12..