Hah! I did some additional on-line research on "Coal Black Rose" and the sea shanty appears to have been derived from an 1820's early minstrel song. Here's what I found:

Notes on Minstrel Song Origins of Coal Black Rose

These notes are taken from a preview of a book partially available on-line; there is a reference to sheet music but the reference is not in the preview.

From America's Musical Life: A History, by Richard Crawford, published by W. W. Norton & Co., © 2001, pp. 201-202

"Coal Black Rose" a song from the 1820's, depicts a black romance that disintegrates into deceit and violence. The song is sung by Sambo who is wooing the heroine:

Lubly Rosa, Samo cum,
Don't you hear de Banjo – tum, tum, tum;
Lubly Rosa, Sambo cum,
Don't you hear de Banjo – tum, tum, tum;
Oh Rose, de coal black Rose,
I wish I may be cortch'd if I don't lub Rose,
Oh Rose, de coal black Rose!

When Sambo shows up unexpectedly at Rose's cabin, she asks him to wait outside in the cold while she builds a fire. Then she lets him in. The two sit warming themselves until Sambo spots Cuffee, a rival suitor, trying to hide in the dark room's corner. And during the fight that follows, he changes his song's refrain:

Oh Rose, take care Rose!
I wish I may be burnt if I don't hate Rose,
Oh Rose, you blacka snake Rose!

Further note: "cortch'd" may be dialect for "scorched" given the above reference to "burnt."

Cheerily,
Charley Noble