I wonder about the origin of "Judas Was a Red-headed Man". The Ragged Kingdom notes say "A Spring carol from Somerset collected by Ruth L. Tongue in 1916". But the British Library entry for this song says that it was collected by Bob Patten from the singing of Ruth Tongue in 1971, and that Ruth Tongue was born in 1898.

I don't know anything about Ruth Tongue. Did she collect folk songs in her teenage years?