Expedition to Central Africa—Private E. Swenny—Journey to Beni-Olid—Hospitality of the natives at Sokna—Black Mountains—Privations and exertions—Private John Maguire—Gatrone—Sufferings of the slaves in their march across the desert—Evidences of the number that perish—Trials of the expedition; halts at Kouka—Party with the department of Practical Art—Sanitary survey of Woolwich—Detachment for survey of Van Diemen’s Land—Additional commissions to the corps—Company at Alderney—Corporal James S. Taylor at New York—Company recalled from the Cape—Company to the Mauritius—Party to Melbourne—Inconvenience of its popularity—Epidemic at Bermuda—Detachment for the Mint at Sydney—Greatcoats 114 1853. CHOBHAM CAMP. Nature of the ground—Position of the sappers—Their strength—Quarters and cantonments—Equipment—Duties and services—The survey—Marking out the encampment—Forming tanks—Wells—Lakes—Construction of stables—Camp-kitchen—Oven—Incidental employments; Royal pavilion; Queen’s road—Sentry-boxes—Post-office and postal statistics—Intrenchments—Submarine mining—Passage of Virginia Water—Her Majesty’s gracious acknowledgments of the conduct of the sappers in the operation—The second passage of the lake—Also of the Thames at Runnymead—Field-days—Inspections by the Queen—Breaking up the camp—Satisfaction of Colonel Vicars and Lord Seaton 126 1854-1856. Staff appointments—Party to Melbourne—Mint detachment to Sydney—Survey of Aldershot heath—Department of Practical Science and Art—Staff ranks to the survey companies—Dress—Party detached to Heligoland—Also to Paris for the Exhibition—Corporal Mack’s services in testing woods—A foreigner’s surprise at the varied employments of the sappers—Sergeant Jenkins’ interview with the Emperor—Fire at the Manutention du Commerce—Radical change in the dress—Arms and accoutrements—Costume of the quartermasters—Supernumerary sergeants—Additional staff appointments—Exhibition at the Mauritius—Arrival of company from Bermuda, and removal to Aldershot—Chatham becomes the head-quarters—Rejection of the services of Van Diemen’s Land detachment by the Legislative Council, which are accepted by the Governor of New South Wales—Organization and pay of driver troop—Additions to the corps and various incidental alterations—Detail of establishment of corps—The band—Its costume—Dress of the bandmaster—Party recalled from Purfleet—Detachment to Hythe for rifle practice, &c.; the system pursued there becomes a leading feature in the instruction at Chatham 147 1854. BOMARSUND—TURKEY—BULGARIA—WALLACHIA.