Bob Bolton's very illuminating message illustrates what I said about Lloyd knowing that singing was more important than study. He tended to make songs singable even to the point of making things difficult for "other" folklorists.
Was it he who quoted Vaughan Williams (I can't find the quotation in any of V-W's writings) "The practice of altering folk songs is an abominable one and I'd trust nobody to do it but myself."?