[4] Imlay first arrived at Sydney in December 1829 on the Elizabeth, and was working as a government medical officer in the Civil Hospital by March 1830.

In 1831 Imlay journeyed to the Illawarra district and on his return reported a disease resembling smallpox had broken out there among the Aboriginal population.

[8]) He was on the move again in 1832 when he accompanied Governor (Sir) Richard Bourke (1777-1855) on a tour of inspection of southern New South Wales.

Alexander Imlay resigned his government post in 1833 and went to Tasmania to act as the local agent in Hobart for his brothers who remained in New South Wales.

[11] The brothers experienced financial difficulties in the economic depression that began in 1840, and handed their 200,000 acres (81,000 ha) cattle run to the Walker brothers, who built a four-roomed Georgian mansion there, naming the property Kameruka, meaning "wait till we return".

They sold the property, 21 km south-west of Bega, to the Twofold Bay Pastoral Company in 1852, and ended up with the Tooth family.