In 1831, during Earl Grey's administration, Sirr attended meetings convened in favour of Parliamentary Reform, and moved resolutions of the most liberal tendency. He voted at the city election for the Reform candidates, and was twitted by the late Thomas Ellis for having deserted his party and forgotten his principles. His answer was simple and true--"I am totally unchanged; I have always supported _the Government_, and I shall continue to do so." When the piers which form Kingstown harbour were in course of construction, the supply of stone was derived from immense quarries at Killiney, and conveyed along a tramway, on which, near the quarries, there were slopes, down which the loaded waggons required no impelling power, but rather to be restrained, by breaks, from acquiring a dangerous velocity. Major Sirr was fond of collecting natural curiosities, especially of a geological nature; and he frequently visited Killiney in quest of spar formations, which were occasionally found there. He was by no means niggardly in his dealings with the spar finders; but still he could not conciliate them into a feeling of kindness or respect. One day he was proceeding up the tramway slope, when the discharge of artillery at the Pigeon House fort attracted his attention. He turned and looked in the direction of the firing, just at the moment when a train of loaded wagons was about to descend. Being right before them, he would have been utterly destroyed in a moment, but the breaksman saw his perilous situation, and applied the requisite pressure, stopped the train, and saved the Major. Several persons witnessed his danger and the prompt means by which it was averted. On the transaction becoming known in the quarries, there was an immediate strike. All work was stopped, and a determination was unanimously avowed to insist on the dismissal of the breaksman. No specific complaint was preferred against the individual whose expulsion was required. The Harbour Commissioners deputed Mr. Hickman Kearney to enquire into the grounds and reasons for such an extraordinary demand. He went to the quarries and called on the workmen to come forward and explain the cause of their animosity to the breaksman. The only reply was that "he should go." It appeared, on reference to the clerk of the works, and to the overseers, that the obnoxious man was honest, sober, diligent, and attentive to his duties; and it was strongly urged that no accident had occurred at the slope since his appointment, and that he had, by his presence of mind and promptitude, saved Major Sirr's life. This produced a general exclamation of "That's the reason he shan't stay amongst us. What business had he to save the Major?" The poor breaksman would have lost his employment, but for an old and influential workman who interfered in his favor, and induced the others to forgive him, _provided he faithfully promised never to do the like again_.