To S. P. Woodward 9 June 
Down Farnborough | Kent
My dear Sir
I shd. be very much obliged to you, if you would take the trouble to inform me, (if you know, or can find out without much trouble) a reference to Kölliker’s Paper on the male Argonaut1 which you showed me in Brit. Museum. I read it somewhere, & I believe in Annales des Sciences,2 & made an extract, but I have unfortunately lost it.— I cannot remember hardly anything about them: are they permanently fixed on the female? Will you just tell me this, for it will be a chance whether I can borrow any Book with an account, & I want to refer to this creature soon.3
Also how does the Male get to the female & how does it obtain its food? I hope you will excuse this trouble, which I cause by having in the most provoking way lost an extract which I well remember making—
Kindest Remembrances to Waterhouse.4
My dear Sir | Yours sincerely | C. Darwin
Asks for reference to article by Kölliker, ["Some observations on the structure of two new species of Hectocotyle", Trans. Linn. Soc. Lond. 22 (1851): 9–22]. Asks for information.