There are persons who hold that the descendants of his followers built the mounds in the Mississippi Valley, and that some of them became the white Mandans of the upper Missouri, and that others founded this old Mexican civilization.

Of course it is all guess-work.

There's nothing about it in the Regulations." "I consider it highly probable," asserted Aunt Maria, forgetting her Scandinavian hypothesis.

"I don't see how you can doubt that that flaxen-haired girl is a descendant of Medoc, Prince of Wales." "Madoc," corrected Thurstane.
"Well, Madoc then," replied Aunt Maria rather pettishly, for she was dreadfully tired, and moreover she didn't like Thurstane.
A few minutes' walk brought them to the rampart which surrounded the pueblo.

Its foundation was a solid blind wall, fifteen feet or so in height, and built of hewn stone laid in clay cement.