There was an Old Man of th' Abruzzi,
So blind that he couldn't his foot see;
When they said, 'That's your toe,'
He replied, 'Is it so?'
That doubtful Old Man of th' Abruzzi.
Edward Lear
http://www.poemhunter.com/poem/limerick-there-was-an-old-man-of-th-abruzzi/
