Discusses apes and their relationships to each other. Writes particularly of the gibbon, its structure and well-developed legs giving it the ability to walk without using its hands.
Glad to hear about colours of Hylobates.
Cannot find any statement about which digits in man are most subject to syndactylism in Isidore Geoffroy [Saint-Hilaire]’s Histoire des anomalies [1832–7].
Asks questions concerned with seasonal and sexual changes in plumage of various bird species.
Does male woodpecker share in incubation?
Discusses the human foot and its abnormalities; notes an example of syndactylism.
Gives his observations on sexual differences in coloration of terns and ostriches.
Reports another case of syndactylism.
Replies to CD’s queries regarding sexual differences in gibbons’ voices, chameleon behaviour, and the occurrence of spurs in pheasants and peahens. Discusses sexual differences in structure and habit within certain bird species.
Questions from CD related to bird plumage and sexual differences, with answers by EB.
Has examined three races of the mouflon sheep and remarks on the extent of variation in them.
Reports on newly discovered Sclater’s pea-fowl from Cochin China.
Discusses peacocks and the rediscovery of the long-lost crested turkey.
Discusses the development of horns in antelopes. Remarks on the variation within and between the species of Cervus and on their relationship to each other.
EB is moving to Wiltshire for a week.
Tells CD of animals acquired, or about to be acquired, by the Zoological Garden.
Thanks CD for invitation to Down.
Wonders if George Darwin can explain why a thin stream of water poured from a jug always spirals right to left.
Discusses the top-knot turkey and the occasional appearance of the top-knot in a breed of cream-coloured turkeys.
Gives CD a reference to one of his papers ["Remarks on the modes of variation of nearly affined species or races of birds", J. Asiat. Soc. Bengal 19 (1850): 221–9]
and discusses moulting in birds.
Quotes instance of an action by an elephant that apparently displays considerable intelligence.
Replies to CD’s questions on sexual differences in birds.
Describes his tour of the Netherlands. Reports on some of the specimens he saw on his trip.
Discusses the coloration of hair in aged monkey
and sexual differences in bird species.
Sexual differences in antelopes (Indian and African).
Will attempt to provide CD with the information requested as soon as he can.
Gives references to some recent papers and articles which might interest CD.
Is currently reviewing Wallace’s new book [Malay Archipelago].
Has found no difference between male and female rhesus monkeys at the Zoological Gardens in amount of facial hairiness. Observations on other monkeys.
