My uncle Wilbur owned a jewelry store.

[Captain O]

For twenty years, he ran it without a hitch. One day he was held up by an armed assailant. When asked by the detective to describe the perpetrator, Wilbur told him it was an elephant. The conversation went on:

Detective: An elephant? What kind? Was it an Indian or African elephant?

Wilbur: How can you tell the difference?

Detective: An African elephant has larger ears in the shape of its native continent. The Indian Elephant has smaller ears.

Wilbur: Well that doesn't help.

Detective Why not?

Wilbur: He had a stocking over his head.