Brian:

Did he really need to invent sources, in order to sell the music? (always remembering that the number of instances where this has actually been demonstrated remains small).

I can't help feeling we're having this discussion back to front. Surely we need to know more about what Lloyd actually did before we talk about why he did it, never mind arguing about whether he was justified in doing it.

I'll confess to almost total ignorance of Lloyd's contribution to the Revival canon. Here's a question: if I were to name (say) three songs Lloyd extensively rewrote and another two he more or less wrote from scratch, what kind of proportion of the songs he collected would those five represent - 10%? 5%? 1%? Another question: how many of the other 90% (or 95%, or 99%) are solidly attested, and how many are still being taken on trust?