Hello, The boundary change in question regarding the north boundary of Saline and Gallatin Counties actually affected very little territory. Previous to the change, the northern boundary ran as an east-west line through Boone's Mill in New Haven on the Little Wabash. This line paid no attention to the section and township lines laid by the original surveyors. Years later, when the mill had faded away until it was simply a memory, the General Assembly cleaned up the issue by moving the boundary line to the next section line to the north which also divided the Township 7 South in half. The move was less than a mile, not five miles as in the book. As to Mantua Township in White County, I've seen it on some very early maps (or someplace). Check out Peck's Gazetteer of Illinois, or one of the other early travel gazetteers. I believe Mantua is listed. That's all I know. It doesn't show up in the book Illinois Place Names, but it did exist as a settlement around the time Illinois became a state or in the 1820s. Jon Musgrave www.IllinoisHistory.com