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Darwin Correspondence Project

To W. C. Williamson   12 February [1848]

Down Farnborough Kent

Feb. 12 th

My dear Sir

I am much obliged for your letter. I am sorry to say I cannot find the lagoon-island calc. mud & suppose I must have sent all to Ehrenberg.—1 I enclose a specimen of the calc. encrustation from Ascension: larger specimens are infinitely more frondescent.2

The coarse rounded & glazed particles of corals &c which you sent me from the Gold Coast resemble the matter thrown up on the shores of Ascension. Beautiful the sand from Devonshire.— As you are interested in the disintegration of shells &c, I send some specimens from K. George Sound in Australia of fine winnowed particles of shells passing into white impalpable powder & afterwards becoming half crystalline by rain water. The facts are given in my vol. on Volcanic Islands.3 I also send a crystal of gypsum from one of the great natural salt-lakes in N. Patagonia:4 within this crystals there is some mud, & very likely infusoria, as animals inhabi[t] this lake of brine.—

Wishing you every success in your interesting labours | I beg to remain | dear Sir | Yours very faithfully | C. Darwin

Do not trouble yourself to acknowledge this.—

Footnotes

CD had supplied Christian Gottfried Ehrenberg with numerous specimens of dust, mud, rock, and soil between 1844 and 1846.
See letter to W. C. Williamson, 31 January [1848].
Volcanic islands, pp. 144–8.
Described in South America, pp. 73–5.

Bibliography

South America: Geological observations on South America. Being the third part of the geology of the voyage of the Beagle, under the command of Capt. FitzRoy RN, during the years 1832 to 1836. By Charles Darwin. London: Smith, Elder & Co. 1846.

Volcanic islands: Geological observations on the volcanic islands, visited during the voyage of HMS Beagle, together with some brief notices on the geology of Australia and the Cape of Good Hope. Being the second part of the geology of the voyage of the Beagle, under the command of Capt. FitzRoy RN, during the years 1832 to 1836. By Charles Darwin. London: Smith, Elder & Co. 1844.

Summary

CD cannot find the lagoon-island mud that WCW asked about, but he sends other geological specimens he hopes will be interesting.

Letter details

Letter no.
DCP-LETT-1156
From
Charles Robert Darwin
To
William Crawford Williamson
Sent from
Down
Source of text
American Philosophical Society (Mss.B.D25.)
Physical description
4pp

Please cite as

Darwin Correspondence Project, “Letter no. 1156,” accessed on 22 October 2019, https://www.darwinproject.ac.uk/letter/DCP-LETT-1156.xml

Also published in The Correspondence of Charles Darwin, vol. 4

letter