I’m Down at the Bottom of the Well is a modern song that Matrim Cauthon hums at several points in the story. Including while planning an escape from Tar Valon after being healed from the ruby dagger's taint, when he was caught at Aiel spearpoint when both groups were attempting to break into the Stone of Tear, and as he plans his escape from Ebou Dar. Mat also remembers the tune as belonging to The Last Stand at Mandenhar, which is a song from the Court of Takedo, in Farashelle over a thousand years ago.
I'm down at the bottom of the well,
It's night, and the rain is coming down
The sides are falling in
and there's no rope to climb,
I'm down at the bottom of the well.