Following her husband's death, Mary Ann Underwood married Charles Sutherland Dowson in 1857 in England. They had a child, Ernest Sutherland Dowson (1859-67).
'Dowson, Mary Ann (1831–1912)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/dowson-mary-ann-25195/text33658, accessed 1 April 2023.