The sounds of his sniffling and heaving drown out nearly everything else, but he becomes aware of some low, strange music: the slaves have begun to sing. A rowing-song? No, that would have a lumbering, yo-ho-ho sort of rhythm, and this is much more complicated, with beats in the wrong places. It must be an Africk tune, because they have meddled with some of the notes, made them flatter than they should be. And yet it's weirdly Irish at the same time. There is no shortage of Irish slaves in the West Indies, where these men first fell under the whip, so that might explain it. It is (musicological speculations aside) an entirely sad song, and Daniel knows why: by climbing aboard this boat and breaking down in sobs, he has reminded each one of these Africans of the day when he was taken, in chains, off the coast of Guinea, and loaded aboard a tall ship.