(Reuters) Sotheby's will auction rare collections of letters from late director Stanley Kubrick (2001: A Space Odyssey). The unpublished correspondence goes on the block in London July 13 as part of a sale of English literature and historical documents.

The Kubrick writings include notes to Peter George, the Welsh-born author who gave him the idea for 1964's Dr. Strangelove, Or: How I Learned to Stop Worrying and Love the Bomb. In one letter, Kubrick tells George that his draft for the black comedy was "marvelous but for a couple of points" and a few "non-American things." The sale includes a series of Dr. Strangelove drafts, with revisions by both Kubrick and George.