The military services of Hamilton were concealed from the common eye, and lay chiefly in his sage counsels; for, young as he was, he had more intellect and sagacity than any man in the army. It was Hamilton who urged decisive measures in that campaign which was nearly blasted by the egotism and disobedience of Lee. It was Hamilton who was sent to the French admiral to devise a co-operation of forces, and to the headquarters of the English to negotiate for an exchange of prisoners. It was Hamilton who dissuaded Washington from seizing the person of Sir Harry Clinton, the English commander in New York, when he had the opportunity. "Have you considered the consequences of seizing the General?" said the aide. "What would these be?" inquired Washington. "Why," replied Hamilton, "we should lose more than we should gain; since we perfectly understand his plans, and by taking them off, we should make way for an abler man, whose dispositions we have yet to learn." Such was the astuteness which Hamilton early displayed, so that he really rendered great military services, without commanding on the field. When quite a young man he was incidentally of great use in suggesting to influential members of Congress certain financial measures which were the germ of that fiscal policy which afterwards made him immortal as Secretary of the Treasury; for it was in finance that his genius shone out with the brightest lustre. It was while he was the aid and secretary of Washington that he also unfolded, in a letter to Judge Duane, those principles of government which were afterwards developed in "The Federalist." He had "already formed comprehensive opinions on the situation and wants of the infant States, and had wrought out for himself a political system far in advance of the conceptions of his contemporaries." It was by his opinions on the necessities and wants of the country, and the way to meet them, that his extraordinary genius was not only seen, but was made useful to those in power. His brain was too active and prolific to be confined to the details of military service; he entered into a discussion of all those great questions which formed the early constitutional history of the United States,--all the more remarkable because he was so young. In fact he never was a boy; he was a man before he was seventeen. His ability was surpassed only by his precocity. No man saw the evils of the day so clearly as he, or suggested such wise remedies as he did when he was in the family of Washington.