Yours, Etc.: Origins and Uses of 8 Sign-Offs
John Henry said to his captain,
“A man ain't nothin' but a man,
And before I'd let your steam drill beat me down,
I'd die with the hammer in my hand, Lord, Lord!
I'd die with the hammer in my hand.”
[1903+; fr the fact that John Hancock of Massachusetts was the first to sign the Declaration of Independence in 1776; John Henry, possibly by confusion with Patrick Henry, because of the prominence of John Henry as a folklore hero, and by near-rhyming resemblance]