Earlier in this thread, for one! Sharp didn't as a rule give his sources' names in One Hundred English Folksongs, but Mr Sparks' set has been widely published by Sharp and others, with collecting details: to be absolutely precise, it was noted on the 8th of August.

Maud Karpeles (ed), Cecil Sharp's Collection of English Folk Songs (OUP 1974)

Maud Karpeles (ed), The Crystal Spring: English Folk Songs Collected by Cecil Sharp (OUP 1975 and 1987)

The Journal of the Folk Song Society (vol. II issue 6 1905)

...and so on. All known traditional versions have been mentioned in this thread, I think; Lomax did not find any.