In 1758 he commanded the Third Division of the Provisional troops under Abercrombie, in the unsuccessful attack upon Ticonderoga. He also served with distinction and courage in the campaign of 1759-1760. In the winter of 1762 while the belligerent forces on both sides were in winter quarters, he had the honor to be chosen speaker of the House of Representatives. On the passing of the Stamp Act in 1765 delegates were chosen by the legislature of the various colonies, to seek out some relief from immediate and threatened evils, by a representation of their grievances to the king and parliament. Gen. Ruggles was chosen as one of the delegates from Massachusetts. The Stamp Act Congress met at New York, Oct. 19, 1765, and General Ruggles was elected president of same. An address to the king was voted and certain resolves framed setting forth the rights of the colonies, and claiming an entire exemption from all taxes, excepting those imposed by the local assemblies. Gen. Ruggles refused his concurrence in the proceedings for which he was censured on his return by the House of Representatives, and was reprimanded by the speaker who occupied his place. John Adams, who claimed relationship with Ruggles before his defection found nothing in his character but what was noble and grand. "Ruggles' grandeur" he wrote, "consists in the quickness of his apprehension, steadiness of his attention, the boldness and strength of his thoughts and his expressions, his strict honor, conscious superiority, contempt of meanness, etc." He was, he said, a man of genius and great resolution. At an early period of the Disunion propaganda. Ruggles, conceiving that the course of the British Government was neither politic nor just, and believing that the Disunion leaders honestly intended to bring about a reform, joined hands with them and as previously stated he was elected President of the Stamp Act Congress, but on the discovery of the real aim of that body, he refused to proceed any further on the road to Disunion and left the Congress. Adams then suddenly discovered, "an inflexible oddity about him, which has gained him a character for courage and probity, and that at Congress." "His behavior was very dishonorable" and governed by "pretended scruples and timidities" and ever since he was "held in utter contempt and derision by the whole continent." But fifty years later, when no advantage could be gained by blackening the character of this brave and honest man, he remembered he was a high-minded man, an exalted soul acting in scenes he could not comprehend.[176] General Ruggles was a staunch, independent and fearless supporter of the government, a son of Massachusetts of which she should be proud. [176] Diary and Letters of John Adams.