Maps
- The Library of Congress has some Sanborn Fire Insurance Maps available for Abingdon, Altona, Galesburg, Knoxville, Oneida, and Yates City
1870 Township Plat Maps
| Rio | Ontario | Walnut Grove | Lynn |
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| Henderson | Sparta | Copley | Victoria |
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| Galesburg | Knox | Persifer | Truro |
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| Cedar | Orange | Haw Creek | Elba |
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| Indian Point | Chestnut | Maquon | Salem |
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