'Simpson, Robert Percy (1826–1887)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/simpson-robert-percy-15715/text, accessed 6 May 2025.
1826
Sydney,
New South Wales,
Australia
9 December,
1887
(aged ~ 61)
Balmain, Sydney,
New South Wales,
Australia