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From Charles Lyell   30 September 1861


Asks for copy of CD’s paper ["Ancient glaciers of Caernarvonshire", Collected papers 1: 163–71]. Gathers that drift of Moel Tryfan is glacial.

Believes Glen Roy roads formed later than submergence of Scotland.

Asks CD’s opinion concerning relative chronology of various glacial deposits, particularly a flint tool find in the Ouse River near Bedford.

Author:  Charles Lyell, 1st baronet
Addressee:  Charles Robert Darwin
Date:  30 Sept 1861
Classmark:  Edinburgh University Library, Centre for Research Collections (Gen.112/2813-16)
Letter no:  DCP-LETT-3270

From Charles Lyell   22 October 1861


Ice could not have formed the blockages in Lochaber unless in every case the water escaped over some col into a contiguous valley on the same watershed, or into the eastern watershed. Supposes that the cols were not land-straits, but the places where the lakes were drained when forced to flow the wrong way.

Author:  Charles Lyell, 1st baronet
Addressee:  Charles Robert Darwin
Date:  22 Oct 1861
Classmark:  Natural History Museum (General Special Collections DC AL 7/1)
Letter no:  DCP-LETT-3294F
Document type
letter (2)
Lyell, Charles[X]
09 (1)
10 (1)