Lieut Colonel Weston after completing his education at the Military College of Addiscombe entered the Indian in 1840 and for the greater portion of his service was attached to the staff of the Bengal Presidency. He was for some years on diplomatic employ at the court of Oude under Sir William Sleeman and Sir James Outram and from 1849, to the mutiny of the native army in 1857 was in sole charge of the operations for the extirpation of the atrocious bands of Thugs, professional stranglers, and poisoners, and Decoits, gang robbers which infested that kingdom. He repeatedly received the thanks of his official superiors for the success which attended his exertions and Sir William Sleeman in his report on the state of erime in Oude records that there were not one tenth of the noted freebooters at large and at work in Oude that existed when Captain Weston first took charge of his office in 1849 and that this diminution was mainly owing to the ability and energy displayed by him.
He was in political charge and vested with special powers at the capture of the Durriabad forts in Oude in March and April 1850 for which he received the thanks of Government and was appointed an assistant to the Resident at Lucknow and his services in the diplomatic department gained amongst other abundant testimony most flattering acknowledgment in Sir William Sleeman's despate to the Govern or General of India Lord Dalhousie and in the special report made by the Resident at the court of Oude to the Governor General dated 11th September 1854.
In 1854 Captain Weston rejoined his regiment under orders for service in Pegu and was employed for some months on detached command on the extreme northern frontier of that province to the eastward of the Irrawaddy which had been devastated and was overrun by predatory bands of Burmese whose incursions aeross the border were incessant .The sickness and mortality amongst the men and horses of Captain Weston's detachment of infantry and irregular cavalry exposed to constant duty amidst the pestilential exhalations of these forests and jungles during the wholo of the rainy season was unusually severe and but few lived to leave Pegu eventually on the relief of the regiment .
Towards the close of that year however Captain Weston was recalled to India to resumo his duties on the Political Staff and in that capacity was present at the memorable interview between the last King of Oude and the British Resident so graphically deseribed by Kaye when on the 4th February 1856 Outram announced to Wajid Ullee Shah that his kingdom had passed from him.
On the annexation of Oude in 1856 he was appointed to the organization and command of the Military Police a force armed and modeled on the system of the Irish Constabulary and consisting of 1000 Cavalry and three regiments of Infantry under the command of European officers and which performed good service in the newly acquired province until the commencement of the Indian mutiny. We learn from Captain Hutehinson's narrative that at the outbreak of the insurrection in 1857 Captain Weston was detached by Sir Henry Lawrence to Mullebad for the purpose of restoring confidence and order to that district then in open armed revolt.
His escort consisted of one company of that 7th Regiment so lately in mutiny at Moosa Bagh and some Mounted Police and Captain Hutehinson adds that nothing but the bold determined firmness of Captain Weston overawed the 3000 fanatic wretehes who surrounded him Captain Weston's Daring Act on the occasion of the mutiny of the Military Police is recorded at length by Rees in his vivid history of the siege of Lucknow and its details afford abundant proof of the respect and affection with which this officer inspired his men even at a time when they showed themselves ingrates and rebels and were in the act of throwing off the authority which they had hitherto acknowledged.
Prior to the commencement of the siege of the Lucknow Residency Captain Weston was appointed by Sir Henry Lawrence to the command of an outpost which he held without a day's intermission from the 30th June to the evacuation of the garrison on 22d November 1857. The fire to which the British force was exposed may be estimated from the fact that the strength of this outpost was kept up to forty five of all ranks vacancies being supplied from the reserve and that its total loss during the siege amounted to fifteen killed and thirty wounded that is by a remarkable coincidence tantamount to the original strength of the outpost.
On the evacuation of the Residency of Lucknow Captain Weston volunteered and was one of the few officers of the Old Garrison who remained at Alum Bagh He was appointed to the Staff of Major General Sir James Outram in command of the force before Lucknow and was made Chief of the Intelligence Department. He was present at the whole of the engagements at Alum Bagh where for many weeks Outram with his little force kept at bay the vast army of mutineers and rebels assembled at and around the capital and he was engaged throughout the subsequent operations on the final advance of the army under the Commander in Chief loading to the capture of Lucknow on the 16th March 1858