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Darwin Correspondence Project

From L. C. Wedgwood   20 January [1872]

6 Q. A. St.

Jan 20th

Out of 25 worm-holes probed with a blunt wire between Jan 6 & 14 on different slopes for a few inches, 8 came to the surface nearly vertical to the slope; the rest at various angles.1

I will try some more, and when I have dug some more trenches will send the result about furrows

CD annotations

2.2 furrows] ‘[& furrows]ink


See letter to L. C. Wedgwood, 5 January [1872]. CD reported Wedgwood’s findings in Earthworms, p. 270, but did not cite her by name.


Earthworms: The formation of vegetable mould through the action of worms: with observations on their habits. By Charles Darwin. London: John Murray. 1881.


Gives results of probing worm-holes with wire.

Letter details

Letter no.
Lucy Caroline Wedgwood/Lucy Caroline Harrison
Charles Robert Darwin
Sent from
London, Queen Anne St, 6
JA 20 72
Source of text
DAR 94: 1b
Physical description
Apc 1p

Please cite as

Darwin Correspondence Project, “Letter no. 8169,” accessed on 6 February 2023,

Also published in The Correspondence of Charles Darwin, vol. 20