Lists of nitrogenous organic fluids that produce contraction in Drosera, and details of how to reproduce results.

Sends address.

Hopes to get Asa Gray’s review of Origin republished.

Argues for single origin of mammals.

Encloses two phylogenetic diagrams indicating possible descent of mammals.

Comments on rodents, marsupials, and dingo in Australia,

and on a paper on the survival of stumps as a result of root grafting.

Argues that man had a single progenitor and consists of a single species.

Comments on destruction of non-white races.

Discusses introduction of rodents to islands by man.

Instructs EN to copy and post letter [2922].

Mentions extinction on St Helena.

Madeira and Canary Island insects are found at Cape of Good Hope.

Regrets errors on dingo in his manuscript on the dog.

Discusses crosses among pigeons.

Compares development in birds and mammals.

Plans to write about other domestic animals.

Discusses races of early man.

Falconer’s discoveries of fossil elephants.

Comments on articles by Asa Gray.

Has read sheets of AG’s third Atlantic Monthly article [Oct 1860] and praises it and AG’s other reviews and articles highly.

Is surprised at the inability of others to grasp the meaning of natural selection.

Has been testing the sensitivity of Drosera, which he finds remarkable.

Asks if AG will be able to make some observations on orchids for him.

Discusses extinction of ammonites.

Discusses August Krohn’s cirripede research and Krohn’s correction of his own work.

Discusses origin of dog in connection with origin of man.

Comments on the guinea-pig in South America.

Notes K. E. von Baer’s view of species.

Mentions difficulty of crossing rabbit and hare.

Agrees with Hooker’s views on variation under cultivation and in nature.

Regrets use of term "natural selection", would now use "Natural Preservation".

Has been observing Drosera. Asks JSH whether a curious motion in the red fluid poured out from the viscid hairs is a known or common phenomenon. It surprised him, but he is "so ignorant of vegetable physiology".

Requests Dionaea now that he knows Drosera so well. Wants to compare fluids secreted; in Drosera they are acid and have antiseptic effect on meat.

Admires DO’s correlation of spiny tree species and dry hot climate. CD suggests that spines, like strange aroma of desert plants, protect against browsing where there are few plants.

Fragrance and unisexuality.

Dimorphism in Viola tricolor.

Thinks he has worked out simple mechanism of movement in Drosera. Believes he is correct that gum has no effect.

Thanks for Trécul paper ["Organisation des glandes pédicellées de la feuille du Drosera rotundifolia", C. R. Hebd. Acad. Sci. 40: 1355–8; Ann. Sci. Nat. (Bot.) 3d ser. 3: 303–11].

Chloroform paralyses plants in 30 seconds.