Of course it is a relief to see any article in Ancient American attributing any stone building to any indigenous people. Elsewhere in the magazine is an article giving credit for many grand stoneworks in various parts of the world, including Peru for example, to a little known red-haired Caucasian people who travelled around building wonderful things while presumably the darker-skinned native people stood and gaped. Can you tell this magazine rubs me the wrong way?
At any rate, the article in question is not online, so take your grilling tongs or your baking mitts along to the book store in order to have a look at the magazine without risking ugly skin boils. If it's brain boils you're worried about, I understand. You can take my word for all this.