Having performed the impromptu ceremony, Swift was reminded by the new husband that a certificate would be required to validate the marriage. Swift obliged with the following bit of doggerel verse:
Under an oak, in stormy weather,
I joined this rogue and whore together;
And none but he who rules the thunder
Can put this rogue and whore asunder.
[In 2001, a couple from New York got married on the wreck of the Titanic, kneeling in a submersible on the ship's deck.]