The original manuscript of "The Yearling" is beginning to crumble due to time and cheap paper, but a University of Florida librarian has a plan to stall its deterioration. Carmen Russell Hurff is overseeing a fund-raising effort permanently to preserve the earliest draft of Marjorie Kinnan Rawlings' Pulitzer Prize-winning novel. The library's preservation staff has begun to de-acidify the 53-year-old manuscript and encase each sheet in a protective plastic enclosure.