February 11, 1811 to June 30, 1883. Rear Admiral. Born in Baltimore, appointed midshipman in April 1828. By 1834 had served in the Mediterranean and West Indies squadrons.
In 1834 to 1841, he was involved with the coastal survey of the United States.
During the Mexican War he was with the Home squadron and served off Tabasco and Tuxpan on the brig USS Washington. In 1850 he commanded the steamship Walker in the Gulf of Mexico. He also invented a sounding apparatus and other hydrographic instruments.
In 1861 he was serving on the West Coast doing survey work and commanding the Active.