William Thomas Lyttleton was born in England and entered the army as an ensign in the 73rd Regiment in April 1809. He was gazetted lieutenant in November 1810, but though known as 'Captain' Lyttleton in Tasmania, he never officially gained that rank. ;;The 73rd Regiment arrived in Sydney in December 1809. In February 1810 a company under Major Gordon arrived at Port Dalrymple in the Tryall, and for a short time Lyttleton was attached to the Commissariat Department. In 1812 he was appointed Naval Officer at Port Dalrymple. From 1814-1821 Lyttleton was stationed at Ceylon, and 1823-1824 in Scotland. Lyttleton was granted leave on grounds of ill health from February 1820 to January 1822 but in November 1824 he sold his commission and retired from the army. ;;On 4 January 1812 Lyttleton married Ann Hortle. Together they had seven children - Rebecca (b.1814 d.infancy), Maria (B.1816) Westcote Whitchurch Lewis (b.1818), William Wallace (b.1823), Thomas Hamilton (b.1826), Emma (b.1828, died infancy), and Emma (1831). In 1825 Lyttleton was granted land near Westbury and the Meander district. With William Archer he rented another 2560 acres at Norfolk Plains.;;In November 1829 he was appointed police magistrate and deputy-chairman of Quarter Sessions at Launceston. Lyttleton is supposed to have built two notable late Georgian houses in Tasmania, Hagley House, Hagley and Pinefield, at Longford. Lyttleton was also a talented amateur artist.;;In 1835 Lyttleton resigned his post at Launceston and in 1836 he sailed for England in the Ann. He died on 7 June 1839 in London. Ann returned to Van Diemen's Land in 1843, passing away in Hobart in 1874.