In 1714 the French garrison was reëstablished at Mackinaw, which remained the headquarters of trade with the Algonquins of the northwest till far into the nineteenth century. Three years later Duluth’s old fort on Pigeon River was reoccupied, to become a great entrepôt of trade with the inland natives; a year later still La Pointe received a small garrison. Ten years passed before the effort to plant French trade and missions was renewed on the upper Mississippi. Charlevoix, the historian of New France, was over in 1720 and traveled by way of Mackinaw and Green Bay to New Orleans. By his advice the French government resolved to plant an establishment in the country of the Sioux, as a centre of trade and mission work, and as a point of departure for expeditions to gain the shores of the western sea. The hostile Sacs and Foxes having been placated, an expedition was planned with all the care which long experience could suggest. For leader was chosen Réné Boucher, Sieur de la Perrière, the same who in 1708 had headed the raiding party which descended on Haverhill, thirty-two miles north of Boston, where his Indians butchered thirty or forty of the English. Two Jesuit fathers, Guinas and De Gonor, attached themselves to the expedition, and asked for a supply of astronomical instruments. In June, 1727, the expedition set out from Montreal and took the then main traveled road by way of Mackinaw and Green Bay. A letter of De Gonor, which has been preserved, gives an interesting account of the journey.