Partial handwritten manuscript, signed twice “F. Sanger,” two lightly lined pages, 8.25 x 11.5, circa 1970. An extract from an article on “the development of methods for the sequencing of proteins & nucleic acids.” The reverse of the first page bears a handwritten note by Sanger, signed “F. S.”: “These are two pages from an article I wrote in about 1970 (the first two pages I think).” Intersecting folds, faint toning, and mild handling wear, otherwise fine condition. R&R COA.