Inspection at Chatham by Lord Hill—Pontoon 289 experiments—Withdrawal of companies from the ports—Reduction of the corps, and reorganization of the companies—Recall of companies from abroad—Purfleet—Trigonometrical survey of west coast of England—Draft to the Cape—Review at Chatham by Lord Hill—Motto to the corps—Reinforcement to the Mauritius—Inspection at Woolwich by Sir Frederick Mulcaster—Mortality from cholera; services of corporals Hopkins and Ritchley—Entertainment to the detachment at the Mauritius by Sir William Nicolay—Triangulation of the west coast of Scotland—Kaffir war—Appointments of ten foremen of works—Death of Quartermaster Galloway—Succeeded by sergeant-major Hilton—Sergeant Forbes—Notice of his father—Lieutenant Dashwood—Euphrates expedition—Labours of the party—Sergeant Sim—Generosity of Colonel Chesney, R.A.—Additional smiths to the expedition—Loss of the ‘Tigris’ steamer—Descent of the Euphrates—Sappers with the expedition employed as engineers—Corporal Greenhill—Approbation of the services of the party—Triangulation of west coast of Scotland—Addiscombe—Expedition to Spain—Character of the detachment that accompanied it—Passages; action in front of San Sebastian—Reinforcement to Spain—Final trial of pontoons—Mission to Constantinople 1837. Change in the dress—Increase of non-commissioned 305 officers—Services of the detachment at Ametza Gaña—Oriamendi—Desierto convent on the Nervion—Fuentarabia—Oyarzun—Aindoin—Miscellaneous employment of the detachment—Trigonometrical survey west coast of Scotland—Inspection at Woolwich by Lord Hill and Sir Hussey Vivian—Staff appointments—Labours of sergeant Lanyon—Staff-sergeants' accoutrements—Expedition to New Holland—Corporal Coles selected as the man Friday of his chief—Exploration from High Bluff Point to Hanover Bay; difficulties and trials of the trip; great thirst—Exertions and critical situation of Coles—His courageous bearing—Touching instance of devotion to his chief—Employments of the party—Exploration into the interior with Coles and private Mustard—Hardships in its prosecution—Threatened attack of the natives; return to the camp 1838.