Attributes the Castilian accent of speech of deaf and dumb men to imitation of their teachers’ lip movements.

Sends some "composite portraits", including three of their family ancestors, as described in Nature [18 (1878): 97–100].

Conveys some information about Dr Erasmus Darwin’s second wife and discusses photos of him and his wife.

Memorandum about Dr Erasmus Darwin’s bequests.

Praises CD’s biography of Erasmus Darwin;

asks CD to answer some queries he is circulating. Is particularly interested in "visualizing faculty" in CD and Dr Darwin.

Will see what can be done about getting thumb impressions, to see if the markings are persistent.

Thanks for mentioning CarlVogt, to whom he will write.

Comments on Dr Erasmus Darwin’s interest in mental imagery.

Reports observations of worms for CD’s use.

Thanks CD for Earthworms and comments on it.

Thanks CD for an article [unspecified].

Congratulates CD on Origin; has been "initiated into an entirely new province of knowledge".

Notes error involving rhinoceros.

Encloses other notes.

On colours and breeding of rabbits.

Asks CD’s advice on procuring rabbits for experiments [to test Pangenesis by transfusing alien blood into does and breeding from them].

Greatly pleased by approbation from CD, whom he admires and whose Origin did much for him.

Interim report on the experiments with rabbits [to test Pangenesis].

Experiments are not going well, but the quantity of blood transfused was small.

Variety in rabbits less than he hoped for; will try a new mode of transfusion.

Better news about the rabbits.

The mark he had thought a variation is not, and he thinks his infusion still too small even when the blood is defibrinised.

Rabbits still running true; hopes to increase alien blood to 30%.