The otter pipe is from a burial mound in present-day Ohio.

Evidence

In one of the mounds there were around 200 stone pipes, one of which is our otter pipe. — Neil MacGregor, A History of the World in 100 Objects, 602

Categorization

• corroborated: 2 independent passages support this claim — Neil MacGregor, A History of the World in 100 Objects, 602