We have the plans of Ancient Mexico and Cuzco; but lack those of Tiahuanaco, Otolum, and many more important for ancient history. Several plans of ancient sites of civilization have been given, along with those of monuments. I have many in Mpt. yet unpublished. The greatest part of modern cities, are built on ancient sites, from Mexico to Chili. In North America, the same happens with Cincinnati, Louisville, Pittsburg, St. Louis, Philadelphia, Savannah, &c. The views of ruined cities, and those of actual cities, are partly historical, connected with the knowledge of gradual American civilization. Many ancient names of islands, lakes, streams and mountains, are preserved in actual names. Such are Cuba, Hayti—Ontario, Erie, Titicaca—Ohio, Alatamaha, Maranon, Parana, Rivers.—Alleghanies, Andes, Parima, Mountains, &c. When the names have been changed, it is the duty of the historical geographer to compare the old and new names. The Mexicans and other civilized ancient nations, could draw and paint maps. Even our North American tribes can draw rude maps on skins or bark. Some of these are preserved in museums; but none have ever been published: although some are pretty correct and deserving it. 4. _Natural Sciences._ They are now becoming sisters of history. Geology is connected with geography. Botany and Zoology, acquaint us with trees, plants and animals, which were used in the arts and agriculture at different periods. The Asiatic origin of maize, called _maza_ by Hesiod and known to the Pelagians (Hughes Greece,) has been unperceived by Humboldt and many others, although it throws some light on the early migrations and communications of tribes. Maize was cultivated in Assyria, West Tartary, North Africa and Java, before 1492, as asserted by Marco Polo, Crawford, Raffles. Gebelin, &c.(3) America had anciently several cereal plants, besides maize, two kinds of indigenous wheat and barley in Chili. The Quinoa and Zizania, the rice of South and North America. Many roots, beans, seeds, fruits and flowers, were cultivated from Canada to Chili. Native dies were abundant, the indigo and annato were natives. Red and yellow cochineal were nursed and collected. Many peculiar kinds of cotton, silks, hemp, flax, agave, palm, &c., were cultivated or collected to use for cloths, threads, ropes, &c. Paleontology, a new science, seeks for the remains of animals dwelling on earth, before mankind. America has already afforded the huge mastodons, elephants, megatherium, megalonyx, as primitive land animals, and many large reptiles, crocodiles of streams and lakes.