|Image Name||Width x Height||Size|
|SIA3618.jpg||640 x 495||99K|
|SIA3618.jpg||1200 x 928||292K|
|SIA3618.jpg||4565 x 3527||2M|
This is a digitally modified image from "Ancient Monuments of the Mississippi Valley" in the "Smithsonian Contributions to Knowledge", Volume 1. In order to better show the features it has been colored and a distance marker has been added.