I've thirty months, and that's my pride,
Before my age's a double score,
Though many lively men have died
At twenty-nine or little more.
I've left a long and famous set
Behind some seven years or three,
But there are millions I'd forget
Will have their laugh at passing me.

John Millington Synge

http://www.poemhunter.com/poem/i-ve-thirty-months/