Staff appointments—Survey of London—Colour-sergeant Smith—Sergeant Bay—Trigonometrical operations—Opposition to the military survey—Observatory above St. Paul’s; the scaffolding—Privates Pemble and Porteous—Sergeant Steel—Industry and conduct of the Sappers in the Metropolitan survey—Preliminary arrangements of the Arctic expedition—Privates Waddell and Sulter—Corporal Mackie—Expedition starts; corporal McLaren—Coasting journeys and services—Overland march—Winter at Fort Confidence—Party detached to Great Bear Lake—Close of the search for Sir John Franklin and his crews 1 1848. Augmentation to corps—A calculating prodigy—Company removed from Portsmouth to Ireland—Chartist demonstration and services of the sappers in London—Road-making in Zetland—Company to the Mauritius—Major Sandham—Sergeant Anderson—Sergeant Ross—Sir Harry Smith’s frontier tour at the Cape—Passage of the Mooi; corporal Pringle—Passage of the Konap; sergeant McLeod; also of the Orange River—Boem Plaatz—Spirited conduct of a party in removing an ammunition tumbril, which had upset in some burning grass—Peace—Inspection at Gibraltar by Sir Robert Wilson—Also at Hong-Kong by Major-General Stavely—Company at Corfu—Return of party to England from the Falkland Islands—Sergeant Hearnden 16 1849. Breach in the sea embankment at Foulness—Company to Portsmouth—Augmentation to corps—Homeward journey of the Arctic expedition—Private Brodie—Great Slave Lake party—Expedition arrives in England—South Australia—Sergeant R. Gardiner—Road-making in Zetland—Survey of Dover—Wreck of the ‘Richard Dart’—Miserable condition of the survivors on Prince Edward’s Island—Found, and taken to the Cape—Remeasurement of the base-line on Salisbury Plain—Shoeburyness—Eulogium by the Marquis of Anglesey—Fatal accident at Sandhurst College 27 1850. Sir Robert Gardiner’s opinion of the corps—Party to the penal settlement at Swan River—Detachment to New Zealand—Draft to Hong-Kong—Mining operations at Seaford Bay—Determinations of the latitudes of various trigonometrical stations—Sergeant James Steel—Professor Airy—The leisure of the sergeant—New method of acquiring a knowledge of chess—Hardships of a party landed at Rona 42 1851.