A Gentleman of Courage by James Oliver Curwood

In the weeks and months following the plague at Five Fingers Father Albanel did not forget his promise to Peter, and back in the shelter of the woods, where their secret was safe between them, he taught the boy "how to fight like a gentleman -- if he had to fight at all. " It was then Peter learned there was something more helpful than brute strength, and as his skill increased and he mastered one after another what the little missioner called "the tricks of the fighting game," his enthusiasm rose to a point where he could scarcely keep his secret from Mona. Their boxing-gloves, which Father Albanel had smuggled from the settlement, they kept securely hidden, and not until years later did Peter know that the holy man who was teaching him had at one time been regarded by fighting men as the handiest man with his fists between Fort William and Hudson Bay.

What he had learned he did not fully realize until early in June, when Aleck Curry and his father and the hateful black tug returned to the settlement. Using the influence of a brother who had been successful in politics, Izaak Curry had obtained timber concessions in several directions about Five Fingers, and now built himself a cabin near the shore, but hidden back in the spruce. This he tenanted with a third brother and his wife, and with them Aleck lived while the tug was making its trips between Five Fingers and Fort William.