Note 49 — AN Historical Journal OF THE Late Monsieur de la Sale’s LAST VOYAGE INTO North America To Discover the River MISSISIPI.
Reading edition
They must have already passed the mouth of the Mississippi (owing to La Salle’s having failed to determine its longitude, in 1682, when he had taken its latitude), and were then sailing along the Texas coast, probably near Galveston Bay, more than 400 miles westward of their desired objective. See note to p. 120, vol. ii, Parkman’s La Salle (Champlain edition).