PLAN OF OPERATIONS FOR 1759--INVESTMENT OF FORT NIAGARA--DEATH OF PRIDEAUX--SUCCESS OF SIR WILLIAM JOHNSON--AMHERST AT TICONDEROGA--WOLFE AT QUEBEC--HIS TRIUMPH AND DEATH--FATE OF MONTCALM--CAPITULATION OF QUEBEC-- ATTEMPT OF DE LEVI TO RETAKE IT--ARRIVAL OF A BRITISH FLEET--LAST STAND OF THE FRENCH AT MONTREAL--SURRENDER OF CANADA. Before following Washington into the retirement of domestic life, we think it proper to notice the events which closed the great struggle between England and France for empire in America. In that struggle he had first become practised in arms, and schooled in the ways of the world; and its results will be found connected with the history of his later years. General Abercrombie had been superseded as commander-in-chief of the forces in America by Major-general Amherst, who had gained great favor by the reduction of Louisburg. According to the plan of operations for 1759, General Wolfe, who had risen to fame by his gallant conduct in the same affair, was to ascend the St. Lawrence in a fleet of ships of war, with eight thousand men, as soon as the river should be free of ice, and lay siege to Quebec, the capital of Canada. General Amherst, in the mean time, was to advance, as Abercrombie had done, by Lake George, against Ticonderoga and Crown Point; reduce those forts, cross Lake Champlain, push on to the St. Lawrence, and co-operate with Wolfe. A third expedition, under Brigadier-general Prideaux, aided by Sir William Johnson and his Indian warriors, was to attack Fort Niagara, which controlled the whole country of the Six Nations, and commanded the navigation of the great lakes, and the intercourse between Canada and Louisiana. Having reduced this fort, he was to traverse Lake Ontario, descend the St. Lawrence, capture Montreal, and join his forces with those of Amherst. The last mentioned expedition was the first executed. General Prideaux embarked at Oswego on the first of July, with a large body of troops, regulars and provincials,--the latter partly from New York. He was accompanied by Sir William Johnson, and his Indian braves of the Mohawk. Landing at an inlet of Lake Ontario, within a few miles of Fort Niagara, he advanced, without being opposed, and proceeded to invest it. The garrison, six hundred strong, made a resolute defence. The siege was carried on by regular approaches, but pressed with vigor. On the 20th of July, Prideaux, in visiting his trenches, was killed by the bursting of a cohorn. Informed by express of this misfortune, General Amherst detached from the main army Brigadier-general Gage, the officer who had led Braddock's advance, to take the command.