To ?   2 May [1869 or later]1

Beckenham

May 2

[discouraging the publication of ill-advised speculations]

[…] When a man has laboured hard in science & has proved that he is capable of original research, he may [some]times indulge in speculation [&] the public will indulge him. But even in this case it is a common error to speculate too largely, for speculation is far easier than observation or experiments […]

The year range is established by the address, which is given in the sale catalogue; CD used a form of his address including ‘Beckenham’ from 1869 onwards.
According to the sale catalogue, the letter is ‘damaged with paper losses’. The length is unknown, as it was sold with two other letters in a lot that totalled five pages. It is not clear whether it is in CD’s hand or not. The other letters were to A. E. Nordenskiöld, 21 December 1881 (see Correspondence vol. 29), and to ?, 29 March 1882 (see this volume).

Please cite as “DCP-LETT-13866A,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-13866A