Analysis of information sources in references of the Wikipedia article "René-Robert Cavelier, Sieur de La Salle" in English language version.
I, René-Robert Cavelier de La Salle, by virtue of His Majesty's commission, which I hold in my hands, and which may be seen by all whom it may concern, have taken and do now take, in the name of His Majesty and of his successors to the crown, possession of the country of Louisiana...
the most thorough work yet on the unsolved centuries-old maritime mystery, generously illustrated with historical and modern photos and maps.
La Salle concentrated thousands of Indians as part of his ambitious plan to protect and exploit the vast new territory that he claimed for France.
Subsequent investigation of the site by the Texas Historical Commission discovered the vessel likely dated to the late 18th or early 19th centuries.