The autograph manuscript to Joseph Conrad's The Sisters is to lead an auction of material pertaining to the writer at Sotheby's London.
The lot is estimated to bring £40,000-60,000 ($47,896-101,844) when it crosses the block on July 15.
Conrad (1857-1924) began writing the story in 1895 but abandoned it the following year.
It remains hugely important to the author's canon, however, in its elucidation of his writing process and was published after he died in 1928.
In addition to Conrad's own writing, it features notes from Edward Garnett - a literary critic and editor who offered guidance in the early stages of his career and remained a lifelong friend.
Soon after Conrad would begin work on some of his best known novels, including Heart of Darkness (1899).
The lot has sold well in the past, achieving $180,000 at Christie's New York in 2001.
An autograph typescript for the final section of Suspense, the author's last novel, is another highlight - valued at £10,000-15,000 ($16,963-25,445).
As with the previous lot, it features extensive revisions that shed light on the way that Conrad worked. The incomplete manuscript was sold to collector Thomas J Wise in 1921, with this fragment the last to remain in private hands.
Suspense was published posthumously, in its unfinished state, in 1925.
We have an extraordinary selection of books and manuscripts available.
Follow the link to get our free newsletter delivered straight to your inbox.