Mary lou williams.. Opus De funk

[PDEE]

A really great , interesting tune. However whenever we check the fake books etc, for a lead sheet, the tune that comes up is attributed to Horace silver.. and it's not the same line.Even on recordings by various people of the MLW tune, Horace gets the credit as composer.. though he was probably just an infant, or a twinkle when it was first recorded
So
a) does anyone have a lead sheet, or where to find it
b) How did Horace name a tune the same as another. From his association with jazz, he surely knew who Mary Lou was, or is there some relationship between what he gets the credit for, and her composition?
c) We have our own ability to put the tune together, but are interested in what MLW really wrote as a composition
Still working on it but willing to share our version if you are interested, but would really like to see what was originally intended by the composer, Mary Lou that is, not Horace.
Any comments?????