better guard our citizens against harassment by law-suits. But England had given it to her judges, and the usual predominancy of her examples carried it to ours. It happened that I had myself a mill built in the interval between Mr. Evans' first and second patents. I was living in Washington, and left the construction to the mill-wright. I did not even know he had erected elevators, conveyers and hopper-boys, until I learnt it by an application from Mr. Evans' agent for the patent price. Although I had no idea he had a right to it by law, (for no judicial decision had then been given,) yet I did not hesitate to remit to Mr. Evans the old and moderate patent price, which was what he then asked, from a wish to encourage even the useful revival of ancient inventions. But I then expressed my opinion of the law in a letter, either to Mr. Evans or to his agent. I have thus, Sir, at your request, given you the facts and ideas which occur to me on this subject. I have done it without reserve, although I have not the pleasure of knowing you personally. In thus frankly committing myself to you, I trust you will feel it as a point of honor and candor, to make no use of my letter which might bring disquietude on myself. And particularly, I should be unwilling to be brought into any difference with Mr. Evans, whom, however, I believe too reasonable to take offence at an honest difference of opinion. I esteem him much, and sincerely wish him wealth and honor. I deem him a valuable citizen, of uncommon ingenuity and usefulness. And had I not esteemed still more the establishment of sound principles, I should now have been silent. If any of the matter I have offered can promote that object, I have no objection to its being so used; if it offers nothing new, it will of course not be used at all. I have gone with some minuteness into the mathematical history of the elevator, because it belongs to a branch of science in which, as I have before observed, it is not incumbent on lawyers to be learned; and it is possible, therefore, that some of the proofs I have quoted may have escaped on their former arguments. On the law of the subject I should not have touched, because more familiar to those who have already discussed it; but I wished to state my own view of it merely in justification of myself, my name and approbation being subscribed to the act. With these explanations, accept the assurance of my respect. TO JOHN WALDO. MONTICELLO, August 16, 1813.