The Mexicans and Mayas believed themselves to be akin to each other, they had several deities and a large stock of traditional lore in common, and there was an essential similarity in their modes of life; so that, since we are now assured that such cities as Izamal and Chichen-Itza were contemporary with the city of Mexico, we shall probably not go very far astray if we assume that the elaborately carved and bedizened ruins of the former may give us some hint as to how things might have looked in the latter. Indeed this complicated and grotesque carving on walls, door-posts, and lintels was one of the first things to attract the attention of the Spaniards in Mexico. They regarded it with mingled indignation and awe, for serpents, coiled or uncoiled, with gaping mouths, were most conspicuous among the objects represented. The visitors soon learned that all this had a symbolic and religious meaning, and with some show of reason they concluded that this strange people worshipped the Devil. * * * * * We have now passed in review the various peoples of North America, from the Arctic circle to the neighbourhood of the isthmus of Darien, and can form some sort of a mental picture of the continent at the time of its discovery by Europeans in the fifteenth century. Much more might have been said without going beyond the requirements of an outline sketch, but quite as much has been said as is consistent with the general plan of this book. I have not undertaken at present to go beyond the isthmus of Darien, because this preliminary chapter is already disproportionately long, and after this protracted discussion the reader's attention may be somewhat relieved by an entire change of scene. Enough has been set forth to explain the narrative that follows, and to justify us henceforth in taking certain things for granted. The outline description of Mexico will be completed when we come to the story of its conquest by Spaniards, and then we shall be ready to describe some principal features of Peruvian society and to understand how the Spaniards conquered that country. * * * * * [Sidenote: The "Mound-Builders."] [Sidenote: The notion that they were like the Aztecs;] [Sidenote: or like the Zunis.]