| Title | As the wheat areas thicken in the west and thin out in the east, the political balance of power in Washington shifts to the northwest |
| Date | 1925 |
| Source | Sandburg, Carl. Abraham Lincoln The Prairie Years. New York: Harcourt, Brace and Company, 1925. |
| Creator | Sandburg, Carl |
| Type | Map |
| Permission | Northern Illinois University |
| Themes | || Lincoln's Biography |
