John Haywood Manley (Manly), soldier, railroad promoter, and state legislator, the son of Charles Manley, was born at Raleigh, North Carolina, on March 6, 1821. He read law with his uncle, William Haywood, and in November 1842 married a Miss Henry. He moved to Texas in 1852 and lived at Galveston until 1855, when he moved to Harris County. There he engaged in railroad building and other businesses until he opened a law office in Houston in January 1859. Manley represented Harris County in the House of the Eighth Legislature, 1859–61. A friend of Sam Houston, he was one of the committee that, at the San Jacinto battlefield on April 21, 1860, drew up resolutions recommending Houston for the presidency of the United States. Manley attended a Houston-for-president rally in New York in May 1860. In the Civil War he commanded Company G of the Texas Artillery, formerly of the Houston Artillery, and in 1862 was promoted to lieutenant colonel of the First Texas Heavy Artillery. In 1868 he was among promoters of a Houston ship channel.