Richie,
Thomas Pettitt has already done a detailed study of TBT and had seen several copies of the dated broadside, one printed for Keed in York.
You can access his paper titled Murdered Sweetheart Ballads: The Berkshire Tragedy, at Academia.edu, but I think you have to be a member which I am.

I've seen the reference in Halliwell's 'Fugitive Tracts' which is also online as you must know at Archive.org