The population of these Pueblos will average nearly five hundred souls each (though some hardly exceed one hundred), making an aggregate of nine or ten thousand. At the time of the original conquest, at the close of the sixteenth century, they were, as has been mentioned, much, perhaps ten-fold, more numerous. Ancient ruins are now to be seen scattered in every quarter of the territory: of some, entire stone walls are yet standing, while others are nearly or quite obliterated, many of them being now only known by their names which history or tradition has preserved to us.

Commerce of the Prairies (1831–1839), Chapter 14 The Pueblos — Novel Fortifications