In order to give increased ventilation in the barracks, as well as to relieve the attention of the soldiers, a large detachment, chiefly of married men, was sent to La Prairie to occupy an old cavalry barrack there; but this step proved fatal to many of them. It was shortly after determined to remove the whole regiment to the Island of St. Helen's, opposite to the city, where the men were encamped. Thirty-seven men died of this scourge between the 12th and 24th of June, 1832, but not a single case occurred after the regiment was placed under canvass. Lieut.-Colonel Macintosh proceeded to England, and did not again rejoin the regiment, having exchanged to half-pay with Lieut.-Colonel G. W. Horton. [Sidenote: 1833] The regiment was moved to Kingston, Upper Canada, in the spring of this year, where it had been stationed on first arriving in the colony, detaching one company to Brockville in aid of the civil power, and a company to Cornwall, where some public works were in course of construction. [Sidenote: 1834] The FIFTEENTH moved this year to Toronto, the seat of Government in Upper Canada, detaching one company to Fort George and another to Amherstburg, frontier posts; and a subaltern's party proceeded to Penetanquishene, the most advanced military post on Lake Huron. The Canadas were again visited this year by the Asiatic cholera; the regiment, however, did not suffer in the least. [Sidenote: 1835] Lieut.-Colonel G. W. Horton, from the half-pay, _vice_ Macintosh, assumed the command of the regiment. [Sidenote: 1836] During the year 1836 the detachments at Fort George and Amherstburg, were relieved by companies from head quarters. [Sidenote: 1837] In the year 1837 all the detachments were withdrawn, and the regiment moved to Quebec, in expectation of returning to England: the unsettled state of the Canadas, however, called for an increased force, and the regiment remained in that garrison during the autumn and winter of 1837. The importance of the citadel at a time when a rebellion had actually broken out, and the population of the place hostile to the government, caused the duty of the garrison to bear heavily upon the regiment, which, with two companies of the sixty-sixth regiment, two companies of artillery, and a battalion of volunteer militia, raised on the emergency, formed the whole force for the protection of this important place. [Sidenote: 1838] On the 9th May, several ships of war were announced by telegraph; and they shortly after anchored opposite the citadel, having on board the Governor-General, the Earl of Durham, and suite, and a brigade of guards, consisting of upwards of 1600 men, under Major-General Sir James Macdonnell. The regiment immediately vacated its quarters and proceeded to Chambly, on the river Richelieu, an important post, as being situated in the centre of a populous and disaffected country.