Where the Gold is Buried, a legend of Old Fort Niagara

Old Fort Niagara guards the mouth of the Niagara River as it empties into Lake Ontario, and was built in 1725 to protect the trade route for France's North American empire. Besieged by British troops in July, 1759, after reinforcements were defeated, Captain Pierre Pouchot surrendered. A legend of the fort concerns the French military chest, in which Pouchot's officers buried their valuables, never to return. In 1789, a Loyalist Quaker, Jeremiah Moore (ancestor of the author) brought his family to British Niagara. He had a map to the treasure and the legend says the British commander let him dig.
That's the legend. This is the story