Constantine had served in the Red River expedition, and then, on account of special qualifications, had been made chief of the Provincial Police in Manitoba, where he was a terror to evil-doers. When the second Riel rebellion broke out and a volunteer regiment was being hurriedly raised in Winnipeg for service in the Big Bear country, Constantine, to the great delight of all of us who joined up with that regiment, became Adjutant. During that campaign he was always to the fore in every crisis and showed particular skill in rooting out men who were inciting the Indians to revolt. One morning of dense fog away beyond Fort Pitt our outside picket was fired on when I had charge of the guard. Calling out the guard and getting them under arms I went over to notify the officer commanding in the camp, but met Constantine with his forty-five ready for action. He had scented the alarm and did not wait for notice before getting out to see what was doing. A less keen-sighted or an excitable man would probably have shot anyone looming up through the fog, as I did from the direction of the shooting, but Constantine, though as quick as a flash, always had himself in hand. After the rebellion he became an Inspector in the Mounted Police, and had so approved himself as a wide-awake, intelligent and courageous officer that when the Yukon sprang up with its special demand he was appointed to be the pioneer in that far region of the north. Of medium height but very compactly built, Constantine was immensely strong, quick in his movements and capable of enduring tremendous strain. If it came to a rough and tumble he was as hard a man to handle as anyone would care to find. These qualities, along with his mental alertness and judicial training, made him a good man to send to a region where he had to exercise many functions until fuller government could be established. Constantine first of all made an investigating and exploratory trip accompanied by Staff-Sergeant Charles Brown. Leaving Moosomin in May in obedience to orders to report in Ottawa for special duty, Constantine received instructions to proceed to the Yukon and make recommendations as to general administration. He accordingly left for the north and by crossing over by the Lewes-Yukon he reached Fort Cudahy on August 7, where he remained about a month before returning by St. Michaels and arriving at Victoria in October. He reported elaborately on the resources, climate and possibilities of the whole country. This was in 1894, and in consequence of Constantine's grasp of the situation and his talent for organization he was sent back next year with the officers and men above indicated, arriving at Fort Cudahy on July 24.