Darwin, C. R. to Haeckel, E. P. A.
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Mentions views of Sars on species.
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EH's work on Siphonophora.
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Transcription
Down. | Beckenham | Kent. S.E.
Oct. 3
My dear Häckel
I received this morning your letter of the 29
I received some time ago your Siphonophoren, & have admired the exquisite Plates; but I have not yet had time to read any as yet, though it now stands as the top book of a pile next to be read. I am very much obliged to you for telling me of the pages, in the work & in your memoir on Sponges, for, as you know, I am a very poor German scholar, & alas shall never improve.
Do not work yourself to death or sickness.
Let your wife sing that into your ears night & day.— I have forwarded your letter & papers to M
My dear Häckel | Yours most truly | C. Darwin
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The year is established by the relationship between this letter and the letter from Ernst Haeckel, 29 September 1869. - +
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See letter from Ernst Haeckel, 29 September 1869. - +
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Michael Sars. - +
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CD refers to Zur Entwicklungsgeschichte der Siphonophoren (On the developmental history of siphonophores; Haeckel 1869a) and `Ueber den Organismus der Schwamme und ihre Verwandtschaft mit den Corallen' (Haeckel 1869b), which was later translated as `On the organisation of sponges, and their relationship to the corals' (Haeckel 1870a). See letter from Ernst Haeckel, 29 September 1869 and nn. 7 and 9. - +
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Agnes Haeckel. - +
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Alfred Merle Norman. See letter from Ernst Haeckel, 29 September 1869 and n. 4.