In 1840, nineteen-year-old Duncanson left Monroe and moved to Mount Pleasant, Ohio, a town north of Cincinnati later known as Mount Healthy, to begin his career in fine arts. Duncanson lived in Mt. Healthy with the Reuben Graham family who were also descendants of Virginian slaves. The community of Mt. Healthy, like Cincinnati, had a substantial free black population. In the nineteenth century, Cincinnati was considered a southern' town on free soil”. Cincinnati was a fast-growing city—the city’s population grew from 43,000 to 115,000 between 1840 and 1850. In particular, Cincinnati attracted many freed or escape slaves in search of a new community. The city hosted one of the largest African-American communities in the U.S. Upon Duncanson’s arrival, the African-American population of the city was approximately 3,000. Many of these 3,000 African-Americans living in Cincinnati were previously enslaved. By 1870, the city had 5,900 African-American residents, with an overall population of 216,000.