Thanks for copies of FVH’s “Preliminary field report [of the U. S. Geological Survey] of Colorado and New Mexico” [Am. J. Sci. 49 (1870): 258–63] and Geological report [of the exploration] of the Yellowstone [and Missouri] River[s under the direction of Captain W. F. Reynolds (1869)].
Down. | Beckenham | Kent. S.E.
I am much obliged to you for your kindness & for the honour which youhave done me in sending your Geological Report of the Yellowstone River& your Preliminary Field Report on the Colorado & New Mexico.f2 I hadheard of your Geological researches on the Colorado & was anxious tosee the conclusions at which you had arrived, & I am therefore especiallyobliged to you for having sent me your works.
With much respect & my best thanks, I remain, | Dear Sir, | yoursfaithfully | Charles Darwin