"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.