John Serocold Jackson moved to Australia in 1825 and had an undistinguished career as army officer and then barrack-master. His son John Alexander Jackson has an entry in the ADB as 'public servant and colonial agent'.
B. R. Penny, 'Jackson, John Alexander (1809–1885)', Australian Dictionary of Biography, National Centre of Biography, Australian National University, http://adb.anu.edu.au/biography/jackson-john-alexander-2265/text2899, published first in hardcopy 1967, accessed online 10 September 2017.