Original sentence: After the fall of Quebec, the British Commander-in-Chief General Jeffrey Amherst prepared to launch a three pronged attack to take Montréal.Chevalier de Lévis' original design for the fort called for stone walls, 200 guns and some 2500 troops.Columns were to advance along the St Lawrence from Quebec to the northeast, up the Richelieu River from Lac Champlain to the south, and from Oswego on Lake Ontario to the west.Lawrence (although Pouchot puts this number at 336) before meeting the forces from Quebec and Lake Champlain, surrounding Montréal.On 6 September, Montréal was surrendered by François Gaston, duc de Lévis.Pouchot had been a British prisoner after the siege of Fort Niagara, but he was later released in a prisoner exchange.The French withdrew in a row galley, pursued by the Onondaga and the Mohawk, but the two British ships found themselves lost in the maze of islands, unable to find a safe route back to the main channel for several days.The attack resumed at dawn of 20 August with the Williamson, Mohawk and the Onondaga all firing on the fort with a combined 50 guns.The engagement took place at Fort Lévis (About one mile downstream from the present Ogdensburg-Prescott International Bridge), Point au Baril (present-day Maitland, Ontario), and the surrounding waters and islands
Edited sentence: After the fall of Quebec after the 1759 Battle of the Plains of Abraham, British Commander-in-Chief General Jeffrey Amherst prepared to launch a three pronged attack to take Montréal.Chevalier de Lévis' original design for the fort called for stone walls, 200 guns and some 2,500 troops.Columns were to advance along the St Lawrence from Quebec to the northeast, up the Richelieu River from Lake Champlain to the south, and from Oswego on Lake Ontario to the west.Lawrence (although Pouchot puts this number at 336) before meeting the forces from Quebec and Lake Champlain and completely surrounding Montréal.On 6 September, Montréal was surrendered by New France's governor, the Marquis de Vaudreuil.Pouchot had been taken prisoner after the siege of Fort Niagara, but he was later released in a prisoner exchange.The French withdrew in a row galley, pursued by the Onondaga and the Mohawk, but the two British ships got lost in the maze of islands, and did not find their way back to the main channel for several days.The attack resumed at dawn on 20 August with the Williamson, Mohawk and the Onondaga all firing on the fort with a combined 50 guns.The engagement took place at Fort Lévis (about one mile (1.6 km) downstream from the modern Ogdensburg–Prescott International Bridge), Point au Baril (present-day Maitland, Ontario), and the surrounding waters and islands