Reports on the snakes he collected in the Galapagos.

Discusses transport of fish to Lake Constance by flooding.

Sends his photograph.

Asks for any information of well-marked sexual differences in snakes, batrachians, or lizards. The rattlesnakes at the Zoological Garden differ considerably in colour.

Sexual differences in reptiles, especially Indian [see A. Günther, The reptiles of British India (1864)].

Thanks AG for information.

The Cyprinodontidae family of fishes exhibits sexual differences as remarkable as any in reptiles or birds [Descent 2: 7, 9–10].

Asks AG for details of variation in patterning of the banded snake.

Note on sexual differences in Monacanthus.

Sends some questions on secondary sexual differences of fishes [missing], which he hopes AG will look over.

Invites AG to come to Down.

Encloses queries on sexual differences and nest-building habits of fish.

Sends proofs of his fish paper.

Will observe modification of colour in fish.

Is studying the development of the axolotl.

Encloses notes in reply to CD’s queries on fishes.

Thanks for answer to questions.

Has analogous questions on reptiles that he will send to AG. The subject interests him, but CD must try not to fall into his common error of "being too speculative".

Sends a list of queries for AG.

Asks whether AG can supply specimens for illustrations [for Descent]. Hopes Mr Ford will do the drawings.

Mr Ford is attending to CD’s drawings [for Descent].

Death of AG’s wife.

Is "astonished & deeply grieved" at loss [of AG’s wife].

Replies to CD’s queries on sexual habits and differences in fish and lizards.

Thanks AG for full answers to queries.

Delighted Mr Ford will undertake drawings [for Descent]; comments on some illustrations he would like.