The garrison of the Vellore Fort in July 1806 comprised four companies of British infantry from H.M.
69th (South Lincolnshire) Regiment of Foot and three battalions of Madras infantry: the 1st/1st, 2nd/1st and 2nd/23rd Madras Native Infantry. The usual practice for sepoys having families with them in Vellore was to live in individual huts outside the walls. However the scheduling of a field-day for the Madras units on 10 July had required most of the sepoys to spend that night sleeping within the fort so that they could be quickly assembled on parade before dawn. Two hours after midnight on 10 July, the sepoys killed fourteen of their own officers and 115 men of the 69th Regiment, However, a British officer, Major Coopes, had been outside the walls of the fort that night and was able to alert the garrison in
Arcot. Nine hours after the outbreak of the mutiny, a relief force comprising the British
19th Light Dragoons,
galloper guns and a squadron of the 3rd Regiment of Madras Native Cavalry, rode from Arcot to Vellore, covering in about two hours. It was led by Captain
Robert Rollo Gillespie, who reportedly left Arcot within a quarter of an hour of the alarm being raised. Gillespie dashed ahead of the main force with a single troop of about twenty men. About 100 sepoys who had sought refuge inside the palace were brought out, and by Gillespie's order, placed against a wall and shot dead. John Blakiston, the engineer who had blown in the gates, recalled: Even this appalling sight I could look upon, I may almost say, with composure. It was an act of summary justice, and in every respect a most proper one; yet, at this distance of time, I find it a difficult matter to approve the deed, or to account for the feeling under which I then viewed it. The prompt and ruthless response to the mutiny snuffed out any further unrest in a single stroke and provided the history of the British in India with one of its true epics; for, as Gillespie admitted, with a delay of even five minutes, all would have been lost for the British. In all, nearly 350 ==Aftermath==