Note 2 — Chapter V · Megalithic Monuments.
N. D'Anvers translation
More rarely tumuli are merely artificial mounds of earth, sometimes rising to a great height. Those of North America are the most remarkable known. That of Cahokia is now ninety-one feet high,2 and was formerly surmounted by a low pyramid, now destroyed. Its base measures 560 feet by 720, the platform at the top is 146 feet by 310 feet wide, and it has been estimated that twenty-five million cubic feet of earth were used in its construction. Major Pearse mentions a tumulus near Nagpore, which is 3,900 feet in circumference, and 174 feet high. Another between Tyre and Sarepta, is 130 feet high by 650 in diameter. It has never been excavated.3