An Athetesis

Sir,

My acceptance I here rescind
and previous promises I void;
the slate is now completely cleaned –
I hope you’ll not be too annoyed.

You should know – all in honesty –
I’d given my agreement impulsively.
Now that I’ve had time to think it through,
I’ve realized I’d been a fool most true.

Please take you back this gauntlet thrown
(or does it belong to yet another git?) –
yes, it is a little damp, I do admit,
but wonder not at it: for 'tis only spit.