Sends fragment of bone from the head of a fish called "Corbin", brought from River Plate by her brother.
23. St. James's Square. | S.W.
Dear Mr. Darwin
My brother who has just returned from S. America has brought from the River Plate the accompanying fragment of bone from a fish's head called Corbin; he is very anxious to know if it ever came under your notice. There are two of these bony substances in the head of every fish. Fibrous threads diverge from the rough bone in to interior— As if this substance were the covering of the brain!. if one can venture to speak of the brain of a fish:
Forgive me for troubling you & for daring to suppose I am mentioning any thing that can be new to you.—
Believe me | Yrs Very sincerely | M C Derby