The original MSS. of most of his writings, partly holograph, partly in the hand of amanuenses or in proof with autograph corrections. Bound tip for the author in fourteen volumes, with occasional notes of the place or time of writing. Quarto. Bequeathed by the author.
Vols. III., IV. (ff. i. + 526; i. + 603). "Principles of Biology" [1864, 1867]. In two volumes. At the end (f. 499) of the first is a letter to the North American Review.