No other period sources substantiate Fort La Jonquière's location. In a 1757 address Louis Antoine de Bougainville, Montcalm's aide-de-camp during the Seven Years' War, listed all of the French "Western Sea" outposts at the time: Saint-Pierre, Saint-Charles, La Reine, Dauphin, Bourbon, Paskoya and des Prairies. Fort La Jonquière was conspicuously absent from his list. After the war Guy Carleton, Governor of Quebec, wrote a letter to Lord Shelburne on 2 March 1768 describing the reach of French fur trade commerce as of 1754. Of the westernmost of the French forts, Carleton wrote, "A fort was erected one hundred leagues beyond Paskoyat, but I have not information enough to put either the fort or the full extent of the river on the map..."