Someone is selling on ebay a copy of the 1940 Fantasia book by Deems Taylor autographed to Sally Holmes by a huge number of Disney artists. Despite some hillarious claims (the seller believes that one of the drawings was created by Dave Disney - the confirmed nickname of Walt (!!) - when the drawing is in fact by Dave Detiege) the quality of this piece is truly exceptional. You can see more drawings at this link.
Who was Sally Holmes, by the way?