Monticello, IL

MONTICELLO, p-y., capital of Piatt co. Il.  Situated on the E. side of Sangamon r., and contains a court house, and about 100 inhabitants.  (Haskell's Complete Descriptive and Statistical Gazetteer of the the United States...,1840)

MONTICELLO, a small post-village, capital of Piatt county, Illinois, near the N. fork of Sangamon river, about 70 miles E. N. E. from Springfield. Laid out in 1838. Population, about 300.  (Baldwin's New and Complete Gazetteer of the United States..., 1854)

MONTICELLO   A thriving city, capital of Piatt county, near the north fork of Sangamon river, about 70 miles cast-north-east from Springfield. Laid out in 1838. Population, about 750.   Jonathan C. Johnson, Postmaster.  (Hawes' Illinois State Gazetteer...,1859)