There is a record in the NSW BDM index for an Andrew Wallace who died in Rookwood Asylum in 1926 aged 89 years.
'Wallace, Andrew W. (1827–1926)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/wallace-andrew-w-24109/text32920, accessed 22 May 2022.