I meant to mention that Hammond's recording, titled 'Purty Polly', has been reissued on vol II of 'Music of Kentucky', Yazoo 2014. Almost nothing is known about Hammond apart from the fact that he recorded 6 sides. Judging from his style and repertoire, Charles Wolfe suggests it is a good bet that he came from north/central Kentucky. In his version, Polly is dispatched with 'a deadly weapon all in his right hand':

He stabbed her to the heart and the blood it did flow (x2)
And down in the grave Purty Polly sure did go

--Stewie.