In May six rank and file were detached from Plymouth to Pendennis Castle. In June of the next year the party was increased to two sergeants and eighteen rank and file, who were employed there until August in repairing the barracks and strengthening the ramparts. 1833-1836. Inspection at Chatham by Lord Hill—Pontoon 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. The corps at Chatham, consisting of two companies and a detachment, were inspected by Lord Hill, the Commander-in-Chief, on the 16th August, 1833, and his Lordship was pleased to express his approbation of their efficiency and appearance. On the 20th of the same month, some experimental practice was carried on with Major Blanshard’s cylindrical pontoons on the canal in the royal arsenal at Woolwich, in the presence of Lieutenant-General Sir James Kempt, the Master-General. In these trials two non-commissioned officers and twenty-four privates from Chatham assisted, and their activity and energy elicited the thanks of the inventor and the commendation of the Master-General. On the recommendation of a committee appointed by the Master-General, the company at Plymouth with the detachment at Pendennis, was removed to Woolwich on the 18th August, 1833, and the company at Portsmouth was also transferred to head-quarters on the 29th of the same month. For nearly fifty years a company had been quartered at each of those ports, and their withdrawal was caused by some approaching alterations in the construction and distribution of the corps.