To H. B. Dobell 6 March [1863]
Down, Bromley, Kent, S.E.
March 6
My dear Sir
I am extremely much obliged to you for your great kindness and all the large amount of trouble which you have taken to oblige me. Your information is sufficient: I feared that Dr. C. might not have given whole case.
With very sincere thanks | Yours very faithfully | Ch. Darwin