Under the influence of these feelings, his lecture became an eloquent plea for peace, and to this object his after life was chiefly devoted. The dispute with England upon the Oregon boundary induced him to go to England, with the design of traveling on foot from village to village, preaching peace, and exposing the horrors and folly of war. His addresses attracting attention, he was invited to speak to larger bodies, and, in short, he spent twenty years of his life as a lecturer upon peace, organizing Peace Congresses, advocating low uniform rates of ocean postage, and spreading abroad among the people of Europe the feeling which issued, at length, in the arbitration of the dispute between the United States and Great Britain; an event which posterity will, perhaps, consider the most important of this century. He heard Victor Hugo say at the Paris Congress of 1850:-- "A day will come when a cannon will be exhibited in public museums, just as an instrument of torture is now, and people will be amazed that such a thing could ever have been." If he had sympathetic hearers, he produced upon them extraordinary effects. Nathaniel P. Rogers, one of the heroes of the Anti-slavery agitation, chanced to hear him in Boston in 1845 on his favorite subject of Peace. He wrote soon after:-- "I had been introduced to Elihu Burritt the day before, and was much interested in his original appearance, and desirous of knowing him further. I had not formed the highest opinion of his liberality. But on entering the hall my friends and I soon forgot everything but the speaker. The dim-lit hall, the handful audience, the contrast of both with the illuminated chapel and ocean multitude assembled overhead, bespeak painfully the estimation in which the great cause of peace is held in Christendom. I wish all Christendom could have heard Elihu Burritt's speech. One unbroken, unabated stream it was of profound and lofty and original eloquence. I felt riveted to my seat till he finished it. There was no oratory about it, in the ordinary sense of that word; no graces of elocution. It was mighty thoughts radiating off from his heated mind like the sparkles from the glowing steel on his own anvil, getting on as they come out what clothing of language they might, and thus having on the most appropriate and expressive imaginable. Not a waste word, nor a wanting one. And he stood and delivered himself in a simplicity and earnestness of attitude and gesture belonging to his manly and now honored and distinguished trade. I admired the touch of rusticity in his accent, amid his truly splendid diction, which betokened, as well as the vein of solid sense that ran entirely through his speech, that he had not been educated at the college. I thought of ploughman Burns as I listened to blacksmith Burritt. Oh! what a dignity and beauty labor imparts to learning."