Besides arranging the geological and mineralogical specimens, he had his 'Journal of Researches' to work at, which occupied his evenings at Cambridge. He also read a short paper at the Zoological Society ("Notes upon Rhea Americana," 'Zool. Soc. Proc.' v. 1837, pages 35, 36.), and another at the Geological Society ('Geol. Soc. Proc.' ii. 1838, pages 446- 449.), on the recent elevation of the coast of Chile. Early in the spring of 1837 (March 6th) he left Cambridge for London, and a week later he was settled in lodgings at 36 Great Marlborough Street; and except for a "short visit to Shrewsbury" in June, he worked on till September, being almost entirely employed on his 'Journal.' He found time, however, for two papers at the Geological Society. ("A sketch of the deposits containing extinct mammalia in the neighbourhood of the Plata," 'Geol. Soc. Proc.' ii. 1838, pages 542-544; and "On certain areas of elevation and subsidence in the Pacific and Indian oceans, as deduced from the study of coral formations." 'Geol. Soc. Proc' ii. 1838, pages 552- 554.) He writes of his work to Fox (March, 1837):-- "In your last letter you urge me to get ready THE book. I am now hard at work and give up everything else for it. Our plan is as follows: Captain Fitz-Roy writes two volumes out of the materials collected during the last voyage under Capt. King to Tierra del Fuego, and during our circumnavigation. I am to have the third volume, in which I intend giving a kind of journal of a naturalist, not following, however, always the order of time, but rather the order of position. The habits of animals will occupy a large portion, sketches of the geology, the appearance of the country, and personal details will make the hodge-podge complete. Afterwards I shall write an account of the geology in detail, and draw up some zoological papers. So that I have plenty of work for the next year or two, and till that is finished I will have no holidays." Another letter to Fox (July) gives an account of the progress of his work:--