Title: Captain Ponsonby, Captain Pearson & Captain Markham, on the staff of Sir George Brown. L-R listed: Captain Arthur Edward Valette Ponsonby, 1st (or Grenadier) Regiment of Foot Guards (1827-1868), Captain Richard Lyons Otway Pearson (1831-1890), and Captain William Thomas Markham (1830-1886

Photograph by Roger Fenton, 1819-1869, photographer