“There are those who, in examining the map of America, do not confine themselves to thinking with the French Pliny that the innumerable islands situated from the mouth of the Orinoco to the Bahama Channel (islands which include several _Grenadins_ not always visible in very high tides or great agitations of the sea) should be considered as summits of vast mountains whose bases and sides are covered with water, but who go farther, and suppose these islands to be the tops of the most elevated of a chain of mountains which crowned a portion of the continent whose submersion has produced the Gulf of Mexico. But to sustain this opinion it must be added that another vast surface of land which united the islands of this archipelago to the continent, from Yucatan to the mouth of the Orinoco, was submerged in the same way, and also a third surface which connected them with the peninsula of Florida and with whatever land may have constituted the northern termination; for we can not imagine that these mountains whose summits appear above water stood on the terminating line of the continent.” He quotes, also, another authority which “can not be suspected,” namely, M. Charles Martins, who said, in the _Revue des Deux Mondes_ for March 1, 1867, “Now, hydrography, geology, and botany agree in teaching us that the Azores, the Canaries, and Madeira are the remains of a great continent which formerly united Europe to North America.” He could have added other quotations in the same strain. Those geologists who believe that “our continents have long remained in nearly the same relative position” would probably give the supposed change a much greater antiquity than Brasseur de Bourbourg would be likely to accept; and the geological “Uniformitarians” would deny with emphasis that so great a change in the shape of a continent was ever effected by such means, or with such rapidity as he supposes. But the latest and most advanced school of geological speculation does not exclude “Catastrophism,” and, therefore, will not deny the possibility of sudden and great changes by this method.