More Letters of Charles Darwin, vol 1 | Page 6

paper on Earthworms before the Geological Society.
1838.
Worked at the Geology of South America and Zoology of Voyage. "Some little species theory."
March 7th: Read paper on the Connexion of certain Volcanic Phenomena and on the Formation of Mountain Chains, to the Geological Society.
May: Health began to break down.
June 23rd: Started for Glen Roy. The paper on Glen Roy was written in August and September.
October 5th: Began Coral paper.
November 11th: Engaged to be married to his cousin, Emma Wedgwood.
December 31st: "Entered 12 Upper Gower Street."
1839.
January 29th: Married at Maer.
February and March: Some work on Corals and on Species Theory.
March (part) and April: Working at Coral paper. Papers on a Rock seen on an Iceberg, and on the Parallel Roads of Glen Roy. Published "Journal and Remarks," being volume iii. of the "Narrative of the Surveying Voyages of H.M.S. 'Adventure' and 'Beagle,' etc." For the rest of the year, Corals and Zoology of the Voyage. Publication of the "Zoology of the Voyage of H.M.S. 'Beagle,'"
Part II.
(Mammalia).
1840.
Worked at Corals and the Zoology of the Voyage. Contributed Geological introduction to
Part I. of the "Zoology of the
Voyage" (Fossil Mammalia by Owen).
1841.
Publication of
Part III. of the "Zoology of the Voyage" (Birds).
Read paper on Boulders and Glacial Deposits of South America, to Geological Society. Published paper on a remarkable bar of Sandstone off Pernambuco, on the coast of Brazil. Publication of
Part IV. of "Zoology of the Voyage" (Fish).
1842.
May 6th: Last proof of the Coral book corrected.
June: Examined Glacier action in Wales. "Wrote pencil sketch of my Species Theory."
July: Wrote paper on Glaciers of Caernarvonshire.
October: Began his book on Volcanic Islands.
1843.
Working at "Volcanic Islands" and "some Species work."
1844.
February 13th: Finished "Volcanic Islands."
July to September: Wrote an enlarged version of Species Theory. Papers on Sagitta, and on Planaria.
July 27th: Began his book on the Geology of South America.
1845.
Paper on the Analogy of the Structure of Volcanic Rocks with that of Glaciers. "Proc. R. Soc. Edin."
April 25th to August 25th: Working at second edition of "Naturalist's Voyage."
1846.
October 1st: Finished last proof of "Geological Observations on South America." Papers on Atlantic Dust, and on Geology of Falkland Islands, communicated to the Geological Society. Paper on Arthrobalanus.
1847.
Working at Cirripedes. Review of Waterhouse's "Natural History of the Mammalia."
1848.
March 20th: Finished Scientific Instructions in Geology for the Admiralty Manual. Working at Cirripedes. Paper on Erratic Boulders.
1849.
Health especially bad. Working at Cirripedes.
March-June: Water-cure at Malvern.
1850.
Working at Cirripedes. Published Monographs of Recent and Fossil Lepadidae.
1852.
Working at Cirripedes.
1853.
November 30th: "Royal Medal given to me."
1854.
Published Monographs on Recent and on Fossil Balanidae and Verrucidae.
September 9th: Finished packing up all my Cirripedes. "Began sorting notes for Species Theory."
1855.
March-April: Experiments on the effect of salt water on seeds. Papers on Icebergs and on Vitality of Seeds.
1856.
May 14th: "Began, by Lyell's advice, writing Species Sketch" (described in "Life and Letters" as the "Unfinished Book").
December 16th: Finished
Chapter III.
Paper read to Linnean Society, On Sea-water and the Germination of Seeds.
1857.
September 29th: Finished
Chapters
VII. and VIII.
September 30th to December 29th: Working on Hybridism. Paper on the Agency of Bees in the Fertilisation of Papilionaceous Flowers.
1858.
March 9th: "Finished Instinct chapter."
June 18th: Received Mr. Wallace's sketch of his evolutionary theory.
July 1st: Joint paper of Darwin and Wallace read at the Linnean Society.
July 20th to July 27th: "Began Abstract of Species book," i.e., the "Origin of Species," at Sandown, I.W. Paper on Bees and Fertilisation of Flowers.
1859.
May 25th: Began proof-sheets of the "Origin of Species."
November 24th: Publication of the "Origin": 1250 copies printed.
October 2nd to December 9th: At the water-cure establishment, Ilkley, Yorkshire.
1860.
January 7th: Publication of Edition II. of "Origin" (3000 copies).
January 9th: "Looking over MS. on Variation." Paper on the Fertilisation of British Orchids.
July and again in September: Made observations on Drosera. Paper on Moths and Flowers. Publication of "A Naturalist's Voyage."
1861.
Up to July at work on "Variation under Domestication."
April 30th: Publication of Edition III. of "Origin" (2000 copies).
July to the end of year: At work on Orchids.
November: Primula paper read at Linnean Society. Papers on Pumilio and on Fertilisation of Vinca.
1862.
May 15th: Orchid book published. Working at Variation. Paper on Catasetum (Linnean Society). Contribution to
Chapter III.
of Jenyns' Memoir of Henslow.
1863.
Working at "Variation under Domestication." Papers on Yellow Rain, the Pampas, and on Cirripedes. A review of Bates' paper on Mimetic Butterflies. Severe illness to the end of year.
1864.
Illness continued until April. Paper on Linum published by the Linnean Society.
May 25th: Paper on Lythrum finished.
September 13th: Paper on Climbing Plants finished. Work on "Variation under Domestication."
November 30th: Copley medal awarded to him.
1865.
January 1st: Continued at work on Variation until April 22nd. The work was interrupted by illness until late in the autumn.
February: Read paper on Climbing Plants.
December 25th: Began again on Variation.
1866.
Continued work at "Variation under Domestication."
March 1st to May 10th: At work on Edition IV. of the "Origin." Published June (1250 copies). Read paper on Cytisus scoparius to the Linnean Society.
December 22nd: Began the last chapter of