Down, | Beckenham, Kent. | Railway Station | Orpington. S. E. R.
My dear Sir
I am delighted to hear that you intend working on the causes of variation.—2 It is a grand subject, & if I were not so old, I would take it up experimentally. But I am nearly worn out, & will not attempt writing on any difficult & complex subject again.— I fear that I have fallen into many mistakes in my work on the Power of movement in Plants, & this ought to be a caution to me.—3 With hearty thanks for your kind letter & good wishes for your success in all your scientific undertakings
I remain | yours very sincerely | Ch. Darwin
Please cite as “DCP-LETT-13415F,” in Ɛpsilon: The Charles Darwin Collection accessed on