 Complete the following phrase:  All of his sons joined the British Army and all but one died while serving. Their eldest son, William Livingstone, was born in 1791, and served alongside his father in the Peninsular War before dying at the Battle of Waterloo in 1815. Their second son, Alexander Watt 17931849, was a lieutet-colonel of the Royal Engineers, and their third son, Thomas Congreve 17991853 a lieutet-colonel of the Royal Artillery. Their fourth son, Frederick Holt 18011871, was major-general and colonel of the 95th Regiment of Foot, and the Governor of South Australia. The fifth son, George Mountain Sewell 18021825, was a lieutet in the 26th Bengal Native Infantry, served as adjutant in the 