Returns JDH’s proofs. He is so involved in Origin he cannot judge force of JDH’s arguments. Some detailed comments.

Haldeman’s old paper [see 2470] clever, but does not have natural selection. Explaining adaptation has always seemed turning point of theory of natural selection.

CD wants JDH to make clear in introduction to Flora Tasmaniae that remarks on CD’s theory refer to his 1858 paper ["On the tendency of species to form varieties", Collected papers 2: 3–19].