The number of Bunurong tribe members at the time of contact with Europeans in the 1800s was estimated to be 300. James Fleming, a member of Charles Grimes' surveying expedition in early 1803, reported observing smallpox scars on members of the Kulin nation tribes he had encountered—indicating that an epidemic had affected them prior to 1803. Smallpox arrived in Australia with the First Fleet in 1788 and reached the Port Philip area in 1790, via the first European settlement in Australia at Port Jackson, claiming at least half the population of the combined Kulin nation tribes.