Summary

Has read WO’s paper [see 7361] with great interest. If WO’s views are confirmed he will be able to explain many odd little details about the colouring of animals.

Can WO observe if the platysma myoides is brought into strong action in people suffering from severe dyspnoea?

Summary

Thanks WO for information on platysma, which he did not know could be brought into voluntary action. Is coming to believe it has nothing to do with expression.

On the relation between white colouring and susceptibility to poisonous plants, CD suggests WO send his paper to J. Wyman and propose he investigate whether white as well as black pigs will eat paint-root.

Summary

Thanks WO for valuable letter. Feels he need not trouble any more about platysma. If WO ever sees someone suffering great fear, CD asks him to observe the neck.

Hopes to visit WO when next in London.

Summary

Sends CD a paper dealing in part with animal pigmentation [Med.-Chir. Trans. 2d ser. 411 [check vol no!?] (1870): 263–90]. Discusses relationship between white colouring and susceptibility to poisonous plants.

Summary

Relates instances of rabbits suffering from a condition which affects only the patches of white on their fur.

Will make observations on the platysma for CD.

Summary

Would be pleased to be visited by CD.

J. Wyman will make observations on black pigs and white pigs in Florida.