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[Printed letterhead] Dr Joseph Leidy, 1319 Locust Street, Philadelphia

My dear Sir

I find among the correspondence of the late Prof. Joseph Leidy a letter from your father Charles Darwin, thanking Prof Leidy for certain papers sent him and also expressing gratification ab. his (Leidys) acceptance of his views on Evolution. You may know that Prof Gray of Harvard and Prof Leidy were among the very first in America to accept this interpretation of Evolution and I should be really indebted to you if you could kindly look over your fathers letters about 1859 - 1861, and grant me the privilege of copying Dr Leidy reply.

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I state 1859-1861, as the letter has after the date & the month 1860 written in lead pencil, as it was not written in ink. This must have been supplied by Dr Leidy.

With respect, Believe me, Yours very truly

Joseph Leidy

To Charles Darwin Esq.

Oct 3, 1902