Yes, a cluster.
Some of the songs are easily identified- "Black Girl," "The Longest Train," and "In the Pines."
Brown, Folklore of North Carolina, vol. 3, Folk Songs from North Carolina,, H. M. Belden and A. P. Hudson, is the first record (coll. 1921).

"Black Girl" was collected by Sharpe-Karpeles. I don't know who first brought this song into the cluster (or when). It is not present in the 1921-1922 version in North Carolina Folklore. Instead, "Little darling ....," and "The prettiest girl ...." appear.
A couple of the verses suggest parlor songs- "Oh, don't you see that little dove ....," "Now don't you hear those mourning doves ...."

Several verses of the 1921-1922 song (Miss Pearl Webb) have one or two lines from still other songs, e. g., "Look down, look down this lonesome road," "His head was found on the driver's wheel," "Pretty Little Foot".

First verse of the 1921-1922 version in Brown:

Little darling, little darling, don't tell me no lie.
Where did you stay last night?
"I stayed in the pines, where the sun never shines,
I shivered when the cold wind blow[ed]."
Chorus-
To the pines, to the pines, where the sun never shines.
Oh, I shivered when the cold wind blowed.

The tune (in Vol. 5) is the one I have commonly heard.