[MISSISSIPPI EXPLORATION]. The Present State of Europe; or, The Historical and Political Monthly Mercury. London: for Henry Rhode and Eliz. Harris, 1699. 8vo (203 x 152 mm). Disbound periodical (old spine residue). FRENCH EXPLORER D’IBERVILLE DISCOVERS MOUTH OF MISSISSIPPI RIVER. Pierre Le Moyne d’Iberville was a French-Canadian explorer and naval officer who, along with his brother Jean-Baptiste, successfully navigated the Gulf of Mexico and entered the mouth of the Mississippi River which provided crucial information to French about the river’s course and surroundings. This discovery laid the foundation for subsequent European claims and colonization in the region including France’s effort to assert control over the vast territories of Louisiana which d’Iberville founded.