A thread on "If you use a Library, Share", prompted from my treasure chest of memory, Richard Brautigan and specifically 'Abortion: An Historical Romance' centred around a Library where Authors deposited unpublished MS where they were cared for, which became a real Library for the same purpose, http://www.thebrautiganlibrary.org
There are over 300 unpublished, physical MSs you can go visit and now there's a Digital Collection.