This information Kindly supplied by Beth Beth@akaroa.ws
Armstrong, Charles (d.1838). Arrivedan Ensign. In 1834 he was given chargea detachment and was stationed at the Murray River. Promoted to Second Lieutenant in 1836. In 1836 he established the military station at Kojonup and was later transferred to the Vasse, where he died of exposure in the bush in the winter of 1838. Lt Armstrong was not known to be a member of any exploration party but assisted a number of explorers including George Layman during his trip from Augusta in 1834.