William Lawson, (2 June 1774 – 16 June 1850) was a British soldier, explorer, land owner, grazier and politician who migrated to Sydney, New South Wales in 1800. Along with Gregory Blaxland and William Wentworth, he pioneered the first successful crossing of the Blue Mountains by British colonists. Early life Lawson was born in Finchley, Middlesex, England to John Lawson and his second wife Hannah Summers. His father owned a successful chandler business and was a descendant of the Scottish Lawson family of Cairnmuir House in the Pentland Hills. Lawson was educated in London and trained as a surveyor. He decided to join the British Army and purchased a commission in the New South Wales Corps as an ensign for £300 in 1799. He received orders to transfer to Sydney, arriving there in November 1800. Officer in the 'Rum Corps' Norfolk Island Shortly after his arrival in Sydney he was posted to work at the penal colony at Norfolk Island under Major Joseph Foveaux. At this time, a planned insurgency of Irish convicts and soldiers on the island was discovered with Foveaux hanging two alleged ring-leaders without trial and punishing others with 500 lashes. Lawson became trusted by Foveaux and was appointed to adjudicate in the island's military court. This court was accused of corrupt practices and in one high profile case which Lawson helped preside over, an appointee to a government position who Foveaux did not like was found guilty of incest. In addition to his military duties on Norfolk Island, Lawson also acquired land and raised sheep. He also obtained a convict mistress named Sarah Leadbeater, who had been sentenced to 7 years transportation for stealing clothes. He developed a long term relationship with Sarah, eventually marrying her in 1812 and having eleven children with her. Involvement in the Rum Rebellion In 1806, Lawson returned to Sydney and was promoted to the rank of lieutenant in the New South Wales Corps. Here he became a close associate with the leading officers including Captain John Macarthur and Lieutenant-Colonel George Johnston. These officers controlled a very profitable monopoly in the colony that centred on the trading on rum, and the New South Wales Corps was called the 'Rum Corps' as a result of this corrupt racketeering. Lawson became an integral part of this clique. In January 1808, when Governor Bligh had John Macarthur arrested on charges of sedition against the