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.