Thomas and Septima, with their two children Mary and Margaret, sailed for South Australia aboard the steamer Bosphorus arriving in Adelaide in June 1855 and settled at Thomas street, Unley, their home for many years.
Mary's mother had some artistic ability and Mary appears to have inherited her mother's love and aptitude for art, and was one of the early students of the School of Arts and Crafts founded by Charles Hill in 1861 and from 1882 run by H. P. Gill.
[3] Overbury died age 71 after falling down stairs leading to the cellar of her home, Prescott Terrace, Rose Park, where she lived with her sister Margaret (died 1932), a school teacher who never married.
Margaret Overbury was for six years a mistress at the school conducted by the Misses Kay (daughters of Robert Kay) at Trinity street, St Peters.
She was co-author (with H. E. Fuller, and edited by Sir William Sowden) of A History of the S.A. Society of Arts Inc. 1856–1931 Among her students were: