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Will call on Sir J. Herschel, then take short trip in the African desert.
Horrified at the publication of "the little book of extracts" from his letters to Henslow ["Letters to Professor Henslow" (1835), Collected papers 1: 3–16].
A defence of the work of missionaries in the Pacific islands and Australia. [The letter was apparently written by RF with supporting evidence quoted from CD’s journal. The letter is signed by RF alone. A summary conclusion, as printed, is signed by both:] "On the whole, balancing all that we have heard, and all that we ourselves have seen concerning the missionaries in the Pacific, we are very much satisfied that they thoroughly deserve the warmest support, not only of individuals, but of the British Government."
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Comments on financial arrangements for John [Stewart] together with other business matters, and asks for an estimate for printing the results of JH's Cape observations.
Charles Lyell wrote letter to JH recently. Now encloses with it letters of introduction to persons in Rio and abstract of paper by Charles Babbage. [Henry] Brougham's attacks on Thomas Young.
Preparing fifth edition of Principles of Geology, using JH's facts about boiling seeds. Mathematical error in CL's climate theory. CL's first speech as president of Geological Society. Criticizes R.S.L. JH's volcanic theory was too complex; will incorporate it into later editions. Benefits to science of Charles Babbage's social parties. Latest publications in geology. P.S. Glad to learn that JH thinks origin of new species may occur through intermediate causes; Germans criticized this. CL chooses not to engage in controversies. Speculates on successive extinction of species. Notes on African hot springs.
Regarding the affair of Dr. Andrew Smith, who has done good work with an expedition. Thinks it desirable that Smith should be given leave of absence to return to England and write up the expedition.
Believes the wires are 0.2" thicker than the old ones. Dust has settled on the parallel wires of the telescope. Advises how adjustment may be made to JH's micrometer for parallelism.
Has returned the drawings to [Andrew?] Smith not having received carte blanche to look at them. Bent one of the thick wires of the micrometer when taking out the plate, so has inserted another. The micrometer will be ready tomorrow. Clean Bermuda webs and two silver wires of 6" diameter.
Comments on observation of comets, the position of Southern Hemisphere stars, and the observation of an annular eclipse.
Note of thanks to JH for interceding on AS's behalf.