In 1808, a French gentleman bought 2,700 acres in Georgetown, N.Y., and erected a chateau on the highest hill. Evidently he was massively wealthy, landscaping the grounds extensively and ordering a hamlet built on the estate, after the fashion of the great French nobles. And he seemed fearful for his safety, securing the house against gunfire and clearing the woods around it.

He roved the estate on horseback, attended by armed servants, and was described as erect, agile, and commanding. When asked to muster for the local militia he responded with outrage, saying he had led a division and participated in making three treaties, but he gave no other clues to his identity. He followed closely the progress of the War of 1812 and of Napoleon, whose ascendancy he evidently feared; when the Corsican met disaster in Russia he returned abruptly to France.

Who was this man? He gave his name as Louis Anathe Muller, but he guarded his true identity closely. Was he a French duke? A son of Charles X? The future king himself? With only circumstantial evidence, there’s no way to be certain. After Waterloo he sold the estate for a fraction of its value, and he never returned to New York.