Horatio Bruce was born February 22, 1830, about one mile south of
Vanceburg in
Lewis County, Kentucky. He was the son of Alexander and Amanda (Bragg) Bruce and named for two of his uncles, Horatio and Washington Bruce. His paternal grandfather was a soldier in the
Continental Army during the
Revolutionary War, and his father was a wealthy landowner who served as a
Whig in the
Kentucky General Assembly in 1825 and 1826. His maternal grandfather also served in the Revolutionary War. Concurrently, he was postmaster of the
post office in Vanceburg. In 1849, Bruce taught at a school in Vanceburg for a five-month term. The following year, he taught for five months in another school in Lewis County. In December 1850, he relocated to
Flemingsburg, where he
read law in the office of Leander M. Cox. He was admitted to the
bar in July 1851 and opened his practice in Flemingsburg. Later that year, he was appointed examiner by the
circuit court of Fleming county, and soon after was elected to the Flemingsburg Board of School Trustees. ==Antebellum political career==