Pinocchio - he worked on the sequence where Geppetto and Figaro settle
down to bed before the Blue Fairy brings Pinocchio to life.
Fantasia - worked extensively on the mushrooms in the "Chinese Dance"
sequence. He apparently re-drew nearly the entire sequence in response
to changes requested by Walt Disney after an earlier version was
complete.
He and Jay Ward were close friends all the way up to Ward's demise.
Ward, apparently, was a painfully shy man and Bill was one of the few
people with whom he continuously socialized.