He served as the third interim part-time Protector of Aborigines from 1837 until 1839, replacing Captain Walter Bromley, who had been dismissed after criticism from The Register[2] and was afterwards found drowned in the River Torrens.
[6][7] Wyatt was appointed Inspector of Schools for South Australia in 1851 (retiring in 1874)[8] and for the remainder of his life was part of every movement that touched the educational or welfare of the colony.
[citation needed] After retiring, Wyatt published Monograph of Certain Crustacea Entomostraca (1883), and he contributed the chapter on the Adelaide and Encounter Bay Aboriginal peoples to the volume on the Native Tribes of South Australia (1879), by J. D. Woods and others.
[9][1][10] In his final years, though growing infirm, Wyatt attended to his many duties, and passed some hospital accounts for payment just a week before his death at 82 on 10 June 1886.
[9][1] Wyatt had bought some town lots at the first land sale held at Adelaide on 27 May 1837, laying the foundation of a considerable fortune.