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From J. G. Malcolmson   2 January 1840

Summary

Discusses CD’s Glen Roy paper; would like to see the theory put beyond dispute. Tells of Mr Stables’ observations on the parallel roads. Discusses geological features of Scotland which he is sure are marine in origin.

Author:  John Grant Malcolmson
Addressee:  Charles Robert Darwin
Date:  2 Jan 1840
Classmark:  DAR 171: 31, Geological Society of London (Membership certificates, 1840)
Letter no:  DCP-LETT-1147

From John Grant Malcolmson   24 July 1839

Summary

Detailed evidence for and against geological elevation along coast of the Indian subcontinent, South Asia, and Arabia. Extensive references to geological literature about these areas.

Describes coral sand-dune and salt-marsh formation.

Author:  John Grant Malcolmson
Addressee:  Charles Robert Darwin
Date:  24 July 1839
Classmark:  DAR 39: 7–10
Letter no:  DCP-LETT-528

From J. G. Malcolmson   31 August 1839

Summary

Observations on the geology of Arabia.

Author:  John Grant Malcolmson
Addressee:  Charles Robert Darwin
Date:  31 Aug 1839
Classmark:  DAR 39: 11
Letter no:  DCP-LETT-533

From J. G. Malcolmson   7 October 1839

Summary

Sends notes on soundings made on coral banks in the China Sea.

His recent geological observations.

Finds a difficulty with CD’s erratic block theory.

Author:  John Grant Malcolmson
Addressee:  Charles Robert Darwin
Date:  7 Oct 1839
Classmark:  DAR 39: 12–14
Letter no:  DCP-LETT-535

From J. G. Malcolmson   30 November 1839

Summary

Sends specimens of coralline with vermiform holes.

J. Allan’s observations of Aldabra and the Cormoros [see Coral reefs, p. 186] and news of his experiments on the growth of coral.

Author:  John Grant Malcolmson
Addressee:  Charles Robert Darwin
Date:  30 Nov 1839
Classmark:  DAR 39: 15–17
Letter no:  DCP-LETT-548

From J. G. Malcolmson   [after 7 October 1839]

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Summary

Comments on the discussion of erratic blocks in Journal of researches [pp. 619, 621–2].

Author:  John Grant Malcolmson
Addressee:  Charles Robert Darwin
Date:  [after 7 Oct 1839]
Classmark:  DAR 50: C24–5
Letter no:  DCP-LETT-559
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