I have this story from opera star Jerry Hadley who admits to "embroidering the truth", so I don't know how much of this is genuine:
When ALW was about to write his REQUIEM, he got together a group of college-aged composers and treated them to a two week stay at his summer home. This ws to be a "Workshop With ALW", and they all signed contracts that stated anything they composed there could be published under ALW's name--if it were published at all. Everyone signed the contract.
ALW assigned all these young composers various parts of a requiem to compose. One talented young man was told to "write a 'Pie Jesu' in the style of the one Faure wrote". All of these kids had their works used by ALW in his REQUIEM and if you listen to the "Pie Jesu" it DOES sound like Faure's.
These kids never got a penny for their efforts...so says Mr. Hadley.
"Long live God!" (GODSPELL)