My dear Ramsay
If you are able to judge of amount of subsidence of the flag-stones, please observe whether anything indicates that the subsidence is not due to their having been originally laid on yielding earth.—2 Are they continued under cover where worms would not act? About what sized squares are the stones? What is age of your House? I think I understood that you had often actually seen worm-castings over the joints.— I have written to Prof. Geikie.3
Yours very sincerely | Ch. Darwin
Please cite as “DCP-LETT-8116,” in Ɛpsilon: The Charles Darwin Collection accessed on