Thread: Old Thai Poem

My first post for a long time,
Can anyone tell me the name of the ancient Thai poem written by a previous Thai King's personal boatman as he was about to be executed for crashing the Royal Barge? He is reported to have written it with his toe in the sand as he was about to be executed.
This may seem a strange place to post this question, but I'm hoping there are some Thai students on-line.
(I've lost my homework question paper and am scared of telling my Thai teacher, (I'm 71 years old)).
The older I get the better it was.
Restless Rider.