Ogden Nash (1902-1971) was, during his lifetime, the most well-known American writer of light verse, and his popularity has continued after his death. His witty style has been imitated by many, but none have quite equalled the old master.
A flea and a fly in a flue
Were imprisoned, so what could they do?
Said the fly, "let us flee!"
"Let us fly!" said the flea.
So they flew through a flaw in the flue.