"Manuscript drafts" refers to the early versions or rough copies of a written work, such as a book or an article, that are not yet finalized or ready for publication. Full definition
Writing coaches can be hired by authors for the entire book development project from initial idea to final manuscript draft. (toughnickel.com)
This includes Virginia Woolf's manuscript draft of Mrs Dalloway and an early travel notebook in which she begins to explore her «stream of consciousness» technique and Sylvia Plath's draft manuscripts of The Bell Jar and extracts from her diary. (goodereader.com)
R.J.D.: designed and executed the study and reviewed manuscript drafts. (link.springer.com)