The convicts had been working for a time in repairing the main-sewer in the royal arsenal at Woolwich, but in consequence of the unhealthiness of the duty, were withdrawn from it. As the work was one of considerable importance to the locality in a sanitary point of view, volunteers to finish the drain were therefore demanded from the royal sappers and miners. One sergeant and eight privates at once undertook the work, continuing at it during a portion of the month of August, and its execution was effected without the slightest injury to any one engaged. This led the Marquis of Anglesey, then Master-General, on the 5th September to extol the labours of the party in these words: “I desire to mark my high approbation and admiration of the gallant conduct of the corps of royal sappers and miners, in volunteering an unpleasant and even dangerous service in the cause of humanity. Such self-devotion, wholly devoid as it is of the stimulus of public honour and of glory, far exceeds the renown gained in the battle-field. I offer my thanks to all the individuals concerned.”[47] On the 6th October an experiment was made at the Royal Military College at Sandhurst, to blow in the barrier-gate of the bastion-fort, which cost the lives of the sergeant and one of the privates employed. Sergeant John Cameron under Major Adams, had the conduct of the arrangements and the preparation of the fuse. Nine pounds of powder were placed in a sand-bag having a canvas tube joining into the middle of the powder. In this canvas tube was fixed a grenade fuse with a piece of cotton in it, calculated to burn a sufficient time after the cotton should burst into flame. The bag of powder placed against the barrier, was covered over with a curved iron shield with a hole in it to permit the fuse to come through, and then four sand-bags were lodged against the shield. The arrangements being completed, all the sappers retired except the sergeant and a private to ignite the fuse. Suddenly the explosion took place, and at once the sergeant was blown into the wet ditch, and the private knocked down on the berm. Both were mutilated in a frightful manner and in a few days expired. The accident is supposed to have arisen from some defect in the fuse which was made by the sergeant. Sergeant Cameron was a zealous and talented non-commissioned officer, had several seasons been employed with great advantage at the college, and presented the institution with some interesting military models. His widow was granted a pension of 10_l._ a-year. ----- Footnote 38: The ‘Times,’ 12th January, 1849. ‘Corps Papers,’ i., pp. 415, 416. Footnote 39: Sir John Richardson, ii., p. 138. Footnote 40: Ibid. Footnote 41: Sir John Richardson, ii., pp. 138-141. Footnote 42: Ibid. ii., p. 144. Footnote 43: