Zumwalt in Parts of Missouri and Illinois

"The Zumwalts were among the earliest white settlers in Missouri, emigrating there in the late eighteenth century. Fort Zumwalt, built in what is now O'Fallon, Missouri, by Jacob Zumwalt in 1797 for protection from the not-so-peaceful Indians, is purported to be the first log structure built north of the Missouri River"--Introduction.