Several other forts were built by Perrot along the Mississippi, none of them more than groups of stout log houses. These were surrounded by a stockade wall of heavy logs well planted in the ground, sharpened at the top, pierced for musket fire, and sometimes surmounted by a small cannon. The stockade whose ruins were unearthed at Trempealeau, measured about forty-five by sixty feet. One of his stockades, Fort Perrot, was on the Minnesota shore of Lake Pepin; still another, Fort St. Nicholas, was near the "lower town" of the Prairie du Chien of to-day, at the confluence of the Wisconsin and the Mississippi; and it also appears that he had a stockade lower down the Mississippi, to guard a lead mine which he had discovered near Galena, because lead was an important article for both fur traders and Indians. Sometimes traders fought among themselves, for the possession of a lead mine. Perrot made frequent voyages to the settlements on the St. Lawrence River, and engaged in some of the French expeditions against the hostile Iroquois of New York. While, on the whole, he was successful in holding the Western tribes in friendship to New France, his position was not without grave perils. One time his old friends, the Mascoutins, rose against him, claiming that he had killed one of their warriors. The claim may have been true, for he was a man of violent temper, and ruled the Wisconsin forests after the despotic fashion of an Asiatic prince. The Mascoutins captured Perrot, in company with a Pottawattomie chief, and carrying them to their village, robbed the commandant of all his furs, and decided to burn the prisoners at the stake. But while being conducted to the fire, the two managed by artifice to escape, and at last reached in safety their friends at the mouth of the Fox River. Another time, the Miamis captured Perrot, and would have burned him except for the interference of the Fox Indians, with whom he was friendly. In 1699, owing to the uprising of the Foxes, the king ordered that all the Western posts be abandoned, and their little garrisons removed to Montreal and Quebec. Thus suddenly ended the career of Perrot, who returned a poor man, for his recent losses in furs had been heavy, and his expenses of keeping up the posts large. Again and again he sought redress from the government, and the Wisconsin Foxes earnestly pleaded that he be sent back to them, as "the best beloved of all the French who have ever been among us." But his star had set, he no longer had influence; and it had just been decided to punish his friends the Foxes. Perrot lived about twenty years longer, on the banks of the Lower St. Lawrence, and died in old age, like Joliet, in neglect and poverty.