Mr. Isaac Simmons, the father of the well-known Miss Julia Simmons, the vocalist, whose name is now connected with most London concerts, and of Mr. Laurence Simmons, a young Sydney singer (who was proceeding with his father to Europe for the purpose of cultivating his fine voice, and pursuing his musical studies), died on the voyage home in the Strathdon, on the 16th of April. The deceased gentleman was for a great part of his life a citizen of Sydney, and was highly esteemed for his uprightness, urbanity, hospitality, and kindliness of disposition.
'Simmons, Isaac (1805–1872)', Obituaries Australia, National Centre of Biography, Australian National University, https://oa.anu.edu.au/obituary/simmons-isaac-20269/text31325, accessed 1 April 2023.