To Hermann Müller 29 March 1
Down, Bromley, Kent Mar: 29. Dear Sir
Your letter has been a great pleasure to me.2 To believe that I have interested and in any degree aided an energetic and skilful naturalist like yourself is in truth the highest reward possible to me.—
—I sent you a few days ago a paper on climbing plants by your brother, and I then knew for the first time that Fritz Müller was your brother.3 I feel the greatest respect for him as one of the most able naturalists living, and he has aided me in many ways with extraordinary kindess.—
Yours very faithfully | Ch. Darwin
Has learned that Fritz Müller is HM’s brother.