... Indians at Fort St. Joseph, on an island 40 miles northeast from Mackinaw, then commanded by Capt. Charles Roberts. When Sir Isaac Brock, governor of Upper Canada, received at Fort George, on the Niagara River , from British spies, notice of the declaration of war, he despatched an express to Roberts, ordering him to attack Mackinaw immediately. He was directed to summon to his assistance the neighboring...