Isaac Hill’s Mission for Jefferson

•December 18, 2024•

by Janet Roney

I’ve read a lot of books about Illinois, but none mention Isaac Hill’s expedition for President Thomas Jefferson to explore the interior of Illinois along the third principal meridian. When I found Hill’s 1811 hand-drawn map reproduced in the reprint of the Montgomery and Bond County History, I gained new insight into the history of the Kaskaskia River Valley.  

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