Scottish geologist (1792-1871) who was the first to investigate the Silurian system. ALS, four pages on two adjoining sheets, 4.5 x 7, August 1, 1861. In part: "I do now recollect, that…Douglas of the Travellers Club, a retired Diplomatist of great respectability & who was in his time a 'charge d'affaires' at Foreign Courts, did say something to me about a picture. Of the picture I know nothing." In fine condition, with soiling to the last page.
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