He was born near the village of Boucherville, in the county of Chambly, Lower Canada, in October, 1807. He was the third son of Antoine Menard Lafontaine, of Boucherville, whose father sat in the Lower Canadian Legislature from 1796 to 1804. His mother's maiden name was Marie J. Bienvenu. There is nothing to be said about his early life. He studied law, and in due time was called to the Bar of Lower Canada, and settled in Montreal. He succeeded in his profession, and while still a very young man achieved a prominent position and an extensive practice. He accumulated considerable wealth, which was augmented by an advantageous marriage, in 1831, to Adèle, daughter of A. Berthelot, a wealthy and eminent advocate of Quebec. He entered political life in 1830, when he was only twenty-three years of age, as a Member of the Legislative Assembly for the populous county of Terrebonne. He at this time held and advocated very advanced political views, and was a follower of Louis J. Papineau. He was not always subordinate to his leader, however, and as time passed by he ceased to work cordially with Mr. Papineau. Their differences were of temperament rather than of principle, and erelong a complete estrangement took place between them. Mr. Lafontaine, however, still continued to advocate advanced radicalism, not only from his place in Parliament, but through the medium of the newspaper press. He continued to sit in the Assembly as representative for Terrebonne until the rebellion burst forth, in which he was so far implicated that a warrant was issued against him for treason, and he deemed it wise to withdraw from Canada. He fled to England, whence he made good his escape across the channel to France. His residence there, unlike that of Papineau, was only of brief duration. He returned to his native land in 1840, having gained wisdom by experience. He was opposed to the project of uniting the Provinces, and spoke against it from the platform at Montreal and elsewhere with great vehemence; but after the passing of the Act of Union he acquiesced in what could no longer be avoided, and in 1841 he offered himself once more to his old constituents of Terrebonne, as a candidate for a seat in the Parliament of the United Provinces. His candidature was not successful, but, chiefly through the instrumentality of Robert Baldwin, who had just been honoured with a double return, he was on the 21st of September elected for the Fourth Riding of the county of York, in Upper Canada. It will be understood from this alliance that Mr. Lafontaine's views had undergone considerable modification. He now perceived that the rebellion of 1837-8 had been not merely a crime, but a political blunder, as there had never been any chance of its becoming permanently successful. With regard to the Union of the Provinces, he looked upon it as a scheme which had been forced upon the Lower Canadian French population, but which, having been