Descended from Richard Warner (born 1550) of Blockley, Worcester, England.
Parents: Cuthbert Hayhurst Warner (1753 - 1822) and Ann Smith.
Siblings: Rachel Warner; Joseph Warner; Ralph Warner, Andrew Ellicott Warner, preeminent Maryland silversmith; William Cuthbert Warner; Julian Warner; John S. Warner.
Wife: Mary Ann Helm; children: Joseph P. Warner, Assayer for Baltimore City; Mary Ann Warner; Richard Warner.
Baltimore silversmith and watchcase maker. Opened shop at 64 N. Gay Street. In partnership with brother Andrew Ellicott (born Harford County, MD 1786; died Baltimore 1870) by 1805. Subsequent addresses: Harrison Street, 1804; 52 North Gay Street 1807-181-; 52 East Street 1813; 9 East Street, 1814-1824; 9 Fayette Street 1827. (Andrew Ellicott Warner listed at other addresses in 1810, 1812-49, 1850-70).
Became first assay master in Baltimore in 1815. Baltimore set up only assay office in the nation; there Baltimore silver tested for purity. Testing for silver became optional in 1830; assay office closed 1842.
Served during the War of 1812; lost a leg in action.
Freemason: Joined St. John's Lodge No. 34, Baltimore, September 22, 1812.