D. A. Spalding has asked for information to help with his experiments on sense of direction in animals. Has arrived at same results as GHD with blindfolded children. Will GHD let him have his results?

CD has forwarded proofs of Descent [2d edition]. Urges GHD not to work on them if his poor health makes them too tiring.

Thanks GHD about Spalding [i.e., for responding to Spalding’s request, see 9472].

Intends to keep working on [Descent, 2d ed.] proofs despite his illness.

Thanks GdeS for his "Études sur la végétation" [Ann. Sci. Nat. (Bot.) 5th ser. 15 (1872): 277–315]. "Nothing can be more important … than your evidence of the extremely slow and gradual manner in which specific forms change."

Hopes GdeS will shed light on whether polymorphic forms like Rubus and Hieracium are generating new species at present; CD doubts this.

Comments on CL’s planned bequest to science. CD would do the same if he had fewer sons.

Movement in plants; effect of syringing on Opuntia plants that capture insects with their flowers.