DEAR SIR,--I have just received your favor of February 20th, in which you observe that Mr. Wirt, on page 47 of his Life of Patrick Henry, quotes me as saying that "Mr. Henry certainly gave the first impulse to the ball of revolution." I well recollect to have used some such expression in a letter to him, and am tolerably certain that our own State being the subject under contemplation, I must have used it with respect to that only. Whether he has given it a more general aspect I cannot say, as the passage is not in the page you quote, nor, after thumbing over much of the book, have I been able to find it.[2] In page 417 there is something like it, but not the exact expression, and even there it may be doubted whether Mr. Wirt had his eye on Virginia alone, or on all the colonies. But the question, who commenced the revolution? is as difficult as that of the first inventors of a thousand good things. For example, who first discovered the principle of gravity? Not Newton; for Galileo, who died the year that Newton was born, had measured its force in the descent of gravid bodies. Who invented the Lavoiserian chemistry? The English say Dr. Black, by the preparatory discovery of latent heat. Who invented the steamboat? Was it Gerbert, the Marquis of Worcester, Newcomen, Savary, Papin, Fitch, Fulton? The fact is, that one new idea leads to another, that to a third, and so on through a course of time until some one, with whom no one of these ideas was original, combines all together, and produces what is justly called a new invention. I suppose it would be as difficult to trace our revolution to its first embryo. We do not know how long it was hatching in the British cabinet before they ventured to make the first of the experiments which were to develop it in the end and to produce complete parliamentary supremacy. Those you mention in Massachusetts as preceding the stamp act, might be the first visible symptoms of that design. The proposition of that act in 1764, was the first here. Your opposition, therefore, preceded ours, as occasion was sooner given there than here, and the truth, I suppose, is, that the opposition in every colony began whenever the encroachment was presented to it. This question of priority is as the inquiry would be who first, of the three hundred Spartans, offered his name to Leonidas? I shall be happy to see justice done to the merits of all, by the unexceptionable umpirage of date and facts, and especially from the pen which is proposed to be employed in it.