Sergeant Johnson's first name is not yet known or when he arrived in/left the colony.
In 1801 Johnson was living with Catherine Harris. They were still together in 1806. The 1806 Muster also records him as living with Mary Hewet (Howe).
* information from Biographical Database of Australia — https://www.bda-online.org.au — accessed 29 July 2020
'Johnson, Sergeant (?–?)', People Australia, National Centre of Biography, Australian National University, https://peopleaustralia.anu.edu.au/biography/johnson-sergeant-30692/text38036, accessed 12 May 2025.