Dear Sir

I have never attended in the least to the subject of moles & am therefore sorry that I cannot express an opinion of any value.—¹ I sh^d. have thought that the hair on moles was a secondary effect, owing to some degree of hypertrophy of the skin, for, as far as I can remember moles often or generally rise a little above the general surface. Hairs are sometimes largely developed on the borders of old ulcerated surfaces, where the blood-supply is superabundant.—

If I were in your place I w^d not make public your notion, until you can get some independent evidence of reversion in such cases.—

I hope that your interest in Natural History may continue, & that you may be successful in any researches which you may make—²

I remain | Dear Sir | Yours faithfully | Charles Darwin