Here are some possibilities and ways to find it:
* It might be a lesser-known or unpublished poem: Check with local libraries or literary archives in the area where you believe the poem originated.
* It might have a different title: Think of any potential variations in the title, like "The Devil's Deal with Billy Markham" or "Billy Markham and the Devil."
* It might be part of a larger work: Search for collections of poetry or short stories by authors who may have written such a piece.
* It might be a folk ballad or traditional tale: Look into folklore archives or collections of traditional ballads from the relevant geographic region.
To assist you further, please provide any additional information you have about the poem:
* Author: Do you know who wrote the poem?
* Origin: Where did you hear about the poem (specific region, time period, etc.)?
* Context: What is your knowledge about the poem's content or theme?
With more information, I might be able to provide more specific guidance.