Today’s Monday: Map Day! revisits and makes a correction to an interesting map that we first discussed here on October 29, 2017, and then re-visited on July 11, 2020. And for unknown reasons, that original 2017 post—according to my monthly WordPress statistics report—was the most-viewed post on this site for the month of January, 2024, with 341 views (!).

Burr, David H. Map of the Northern Parts of Ohio, Indiana and Illinois and Michigan and that part of the Ouisconsin Territory lying East of the Mississippi River, 1836, detail of title & author. Library of Congress.
The 2020 re-post was originally conceived as a kind of addendum to our June-July, 2020, multi-part discussion of the earliest Wisconsin territorial, state, and federal censuses. It also served to locate Jonathan M. Clark in Wisconsin Territory during his U.S. Army service from September, 1833, to September 19, 1836.
Today’s post includes one particular correction that I’ve been meaning to make for a while. When I added my original annotations to a detail of this map (in red), in 2017, I made an error. I mislabeled Sgt. Jonathan M. Clark’s location at the time he mustered out of service, a temporary army camp along the under-construction military road from Fort Howard (Green Bay) to Fort Winnebag0 (Portage). JMC’s muster-out location was always referred to in the records of the Fifth Regiment of Infantry as “Camp Hamilton.” For some reason, when I made my annotated detail map, I incorrectly labeled this place “Ft. Hamilton.” A minor error, but worth correcting , especially now that this map is receiving fresh attention.1
It’s 1836. Where’s…Wisconsin?
In September, 1836, Sgt. Jonathan M. Clark was discharged from the U.S. Army at “Camp Hamilton,” Wisconsin Territory, after serving his three-year term of service with Co. K, Fifth Regiment of Infantry.2 One year later, in the autumn of 1837, Jonathan’s future wife Mary Turck would make the long trip from Palmyra, New York, to Milwaukee and finally Mequon, Washington County, Wisconsin, with her parents Peter and Rachael Turck and six younger siblings. By the end of 1840 Jonathan and Mary would be married and starting their family in Mequon.
That seems simple enough, until you take a moment to wonder how much Jonathan—or especially Mary and her family—knew about this new Wisconsin Territory. Jonathan had been in the territory since October, 1833, mostly on post at Ft. Howard. In the last year or so of his service he was busy cutting trees and building bridges for the military road along the Fox River waterway from Ft. Howard (Green Bay) towards Ft. Winnebago (near modern Portage). As a road-building soldier, Jonathan might have done some surveying and seen—or helped draw—a variety of maps of the military road and its vicinity. But for a better overview of this new territory, Jonathan or Mary might have sought out a map such as this:
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