Jeremiah Morrow came to the Northwest Territory from Pennsylvania in 1795 at age 23, purchased land along the Little Miami River in Deerfield Township, and married Mary Parkhill of Pennsylvania in 1799. Around 1800 he built a barn that is one of Warren County's oldest standing structures. In 1801 he was sent to the Second Territorial Assembly and to the first Ohio Constitutional Convention in 1802. In 1803 he was elected the new state's first U.S. Congressman and was Ohio's only congressman for ten years. In 1813 the Ohio legislature elevated him to the U.S. Senate, and in 1822 he became Ohio's ninth governor. He later served in both the Ohio House and Senate and at age 69 returned to Congress, giving his country 43 years of public service. He built the barn with a room in front, a large stone fireplace, and stairs leading to a loft, while the back had stalls for horses and space for other livestock entering through rear doors. He built a house next to the barn and in 1815 built a mill across the road. His mill was razed in 1904, but the millrace remains. Morrow also worked to get the Little Miami Railroad built, Cincinnati's first railroad, and served as its president without pay for more than ten years; its first locomotive was named Gov. Morrow. Mary Parkhill Morrow died in 1845. The couple had eleven children, but only one lived to old age. Jeremiah Morrow died at age 80 in 1852 and was buried in Union Cemetery.