Re your unknown US version, it appears on this web page Blow Away The Morning Dew... but without attribution. There is an email address on this page Contact, so it may be worth asking if he knows the source.

All the versions in the Roud index that start There was a farmer's son seem to have been collected by Sharp, but the one version I have from him is followed by Keep sheep..., so that's probably no help.

Mick