Kingston, in 1859, and passed the final examination in March, 1862, receiving the degree of Doctor of Medicine and Surgery, and his license to practice in Canada, from the hands of Governor-General Monk. On the 13th of April following, Dr. Chamberlain located at Morrisburg, County of Dundas, on the St. Lawrence River, and during the succeeding years built up a large and lucrative practice. In 1859 he was requested by the government of Sir Oliver Mowat to take the Inspectorship of Public Institutions of Ontario. The history of the doctor during these years is the history of a busy life. Besides following his profession, he served as Reeve of his municipality, member of the Counties’ Council, and Warden of the United Counties of Stormont, Dundas and Glengarry, Justice of the Peace, Health Officer, member of the High and Public Board of Education, Director of the Agricultural Association, and Director of the Parry Sound Lumber Company. Inspector of schools for County of Dundas. At the time of the Fenian Raid, he was member of a strong company of volunteers under Captain I. N. Rose, Superintendent of the Williamsburg Canals, and with other members of the company was out night and day on guard at the locks, and in the village, as an attack was daily expected to be made by General O’Neal. On the 1st of July, the General with 1,600 men appeared on the bank of the river opposite Morrisburg. The Government of Sir John A. Macdonald, realizing the seriousness of the situation, and desirous of keeping informed of O’Neal’s movements, appointed a man to keep in touch with O’Neal’s forces, but this man failing to accept, Dr. Chamberlain, a strong personal, but not a political, friend of Sir John’s, was detailed for this duty. He accepted the appointment, and taking his horses and buggy, and accompanied by a young man named Leslie Weaver, set out to follow the Fenian force, and to report as fully as possible their movements and designs. Crossing the river to Waddington, N.Y., on Capt. Murphy’s Ferry, on July 9, he found that the Fenians had moved, and he followed them to Malone, about 50 miles distant, over-taking them about dark. Staying over night and having obtained all information possible, he left the next morning for Plattsburgh, which place he made that evening. After a wearisome and anxious night, he left Plattsburgh for Whitehall, at the foot of Lake Champlain, arriving there the next morning, and at Saratoga in the evening. He continued the journey to Troy and Albany, and returned thence to Ogdensburg, Prescott, and home to Morrisburg. The result of this close espionage, and prompt reports by the scouts, and the careful guarding of the river, was that the invaders were compelled to abandon their design of crossing the river, and to turn their faces to the west. The doctor’s services on this occasion were most effective and valuable, yet he never applied for nor received land grant, or medal, nor refund of his expenditure.