 The task of dividing plots perpendicular to the coast was made much easier by the fact that numerous ravines, difficult to cross, cover Réunion, starting from the heights and striating the sides of this cone-shaped island.Each lot might therefore be bounded by two torrents, as is the concession stretching from the shore to the mountain peaks that Governor Jacques de La Cour granted to Chauveau et Grimaud on 10 February 1699 between Ravine Saint-Gilles and Ravine des Sables.The downhill flow of the water forms nearly incontestable natural bounds for the property.