To Henry Lee 25 February 
Down. | Bromley. | Kent. S.E.
I am very much obliged for your kindness in sending me the results about the sexes of Trout.—1 I am anxious to ascertain approximately the proportional numbers of the sexes in any animals; but there are so many causes of error that I fear I shall not succeed.
With my best thanks for your information I beg leave to remain | Dear Sir | Yours faithfully | Charles Darwin
Thanks for results on sexes of trout. [See 5793.] CD is collecting information about the proportional numbers of sexes in animals.
Please cite as
Darwin Correspondence Project, “Letter no. 5934A,” accessed on 25 October 2016, http://www.darwinproject.ac.uk/DCP-LETT-5934A