Has completed a memoir on the Aymara Indians of Bolivia [J. Ethnol. Soc. n.s. 2 (1870): 193–305] and is going to lecture on them.
Believes he has data relevant to CD’s work on man.
11, York Place, | Portman Square, | London. W.
13 June. 1870
My dear Mr Darwin
I have just returned from a two months residence in Poland andon Tuesday 21st. am to give my lecture on the Aymara Indians—f1It would give me profound pleasure to see you there if your healthwould permit you, for I believe I shall bring forward some veryimportant points in support of your views— I took all my notes withme to Poland and accomplished there what I am sure I should not havedone here, ie a somewhat complete memoir on the subject— I thinkit will be about 90 pages or so of 8vo print—and if I amnot overrating its importance, I believe it contains some ratherimportant data in fact I was surprised myself at the number ofobservations when I came to string them together. My intention wasif time had allowed it to have placed the MS in your hands before thelecture but I have only just got back and find I have to copy out fair,some of it and fill in some references &c which I had not with me—soI shall not be able to do so— the measurements are all put inproper form and I have made out a sketch so as to compare them with otherNations. black & white—proving I think the case about the altitude &ccompletely & several other differences for which I at present can assignno reasonf2
Mr Squeer the Nicaraguan–Peruvian traveller is now in Paris andcomes over the morning of my lecture expressly for it & has sentalready a number of illustrations which will assist me—and I thinkthat there will be others who can speak on the subject.—f3 I shallof course only give an abstract of the more interesting and importantconclusions vivâ voce—or otherwise it would take up far too muchtime—
I do not know whether your book is as yet so far advanced that itis too late to supply you with any data but now that I have got thismatter off my hands at last—I think you will find in my MS. better or rather more correct data than what you noted down inthe course of our conversation when I had to trust mainly torecollectionsf4
Trusting that your health is better now that we have such fine weather |I remain my dear Mr Darwin | Yours most sincerely | David Forbes