The 1822 Muster records John Single as having arrived free in the Colony of New South Wales aboard the "Harriett". The "Harriet" arrived in 1817. Also recorded in the 1822 muster was John's wife Sarah, born in the colony, and their 2 children Sarah and John.
According to the Penrith City Council:
John Single acquired Nepean Park in 1819 and the house (Nepean House) was built 1822. John Single was one of the most sucessful pioneers in the Nepean district. He made full use of new scientific methods in agriculture and grazing. He built a school on his property and supported the building of the Castlereagh Anglican Church.