Thanks for EH’s Anthropogenie, 3d ed.

Sends Cross and self-fertilisation.

Thanks EH for album of photographs of German scientists.

Thanks EH for birthday greetings.

Mentions his work on movement of plants.

Thanks for kind letter.

Has not yet read EH’s article in Kosmos ["Einstämmiger und vielstämmiger Ursprung", 4 (1878–9): 360–76].

Rudolf Virchow affair lamentable. Virchow’s conduct inexplicable.

Admires EH’s Freie Wissenschaft und freie Lehre [1878].

Virchow’s conduct is shameful.

Suggests possible visit by EH.

Comments on EH’s research.

Invites EH to spend night at Down.

Confirms details of EH’s visit to Down.

Thanks EH for copy of book [Das System der Medusen (1879)].

Thanks for his very kind letter.

Asks EH to call on Zeiss and to help arrange for microscope for Francis Darwin.

EH’s scheme to visit Ceylon an excellent one. Has written to Huxley about getting money from Royal Society. If funds are unavailable, would like to subscribe £100.

Thanks EH and Ernst Abbe in connection with microscope for his son [Francis].

Arranges for EH’s visit to Down.

Returns letter mailed by mistake [see 4361].

Hopes CD will accept gift of his Radiolarien [Die Radiolarien, 2 vols. (1862)].

No book has made such a powerful impression on EH as the Origin. Most older German scholars opposed to it, but number of supporters growing among the young. Fortunately strength of religious dogmas now small among educated Germans. Situation in Jena especially favourable. Defended CD’s theory last year at Congress of German Scientists in Stettin.

Intends special study of jellyfish.

Plans general work on natural history.

Hard fate [death of Anna Sethe Haeckel] has made EH indifferent to criticism.

Colleagues August Schleicher and Carl Gegenbaur also convinced by CD’s theory.

Sends photographs of himself and his late wife [Anna Sethe]. Describes death of his wife.

Plans trip to the Alps.

Thanks CD for biographical information about himself.

Mentions Goethe as early evolutionist.

Cites Kant as early supporter of epigenesis.

Mentions criticism of CD’s theory by R. A. von Kölliker ["Über die Darwin’sche Schöpfungstheorie", Z. Wiss. Zool. 14 (1864): 174–86].

Thanks CD for notes concerning the development of his ideas about the origin of species. Says August Schleicher and Carl Gegenbaur also interested.

Names new supporters of CD’s theory, including Max Schultze, Rudolf Leuckart, and Alexander Braun. Zoologists have been more interested than botanists.

He is writing a general work on the relationships among animals [Generelle Morphologie der Organismen (1866)].

Comments on Fritz Müller’s Für Darwin [1864].

Gegenbaur is revising his Grundzüge der vergleichenden Anatomie [2d ed. (1870)] to accord with evolution.

Thanks CD for copy of book on balanids [Living Cirripedia, vol. 2].

Has heard from Huxley that CD has been ill.

Progress on his book [Generelle Morphologie (1866)] has been slow.

Has been named "ordentlicher Professor". Has 150 listeners in his lectures on CD’s theory.

Thanks CD for copy [of "Climbing plants"].

Sends his book [Beiträge zur Naturgeschichte der Hydromedusen, 1. Heft: Die Familie der Rüsselquallen (Geryonidae) (1865)] and two articles.

Calls attention to a new rhizopod from Nice.

Comments on CD’s health.

Discusses origin of life and differentiation of principal classes of plants and animals.

Discusses Generelle Morphologie and its chapter on embryological development.

His lectures on CD’s theory.

Asks CD for larger portrait of himself and for several copies of the small photograph. Will send photographs of German scientists in exchange.