Every tune from the original show began as Mr. Leigh's Melody and Mr. Darion's words, I have those sheets wtih Mr. Leigh's hand and Darien's on them (some copies) and then from those the ORIGINAL full scores used by the conductors--it is interesting particularly as a study as Mr. Leigh in some cases presented rough iideas for orchestrations - most fully discarded by my Grandfather Carlyle Hall, a student of Tibor Serley and Bela Bartok.
I have eveery song and socre in including conductor's piano sheets and most instrumentation notes--eg. one can see the evolution of the famous drumming triplets on the IMPOSSIBLE DREAM Spring to life from quadruplets on the Leigh score...a large distinction in Spanish style compared with the composers' original guesses.....oddlly, Mr. Hall only received credid posthumously at the last Reviva of the show as an act of courtesy from Mr. Leigh whose co. Music Makers my Grandfather was employed by and therefore begrdugingly agreed only on that ONE muscial- his greatest and perhaps only Broadway success (in Mr. Leigh's case as well arugably). I know the Yale School of Music is named for Mr. Leigh but not sure he would necessarily want these to surface there--seems rumor was spread he did the orchestrations as he owned the company much to my family's chagrin and dismay.
In any case- I doubt I would part with these as they are essentially priceless family heirlooms but they will deteriorate in time without exceptional care so it is a consideration that a museum might better preserve the works...
thanks,
Peachy