Final answer:
Isaac Nichols was appointed as Australia's first Postmaster in 1809, marking the start of an organized postal system in the colony of New South Wales.
Step-by-step explanation:
In 1809, Australia's first Postmaster was Isaac Nichols. Taking on the role after being chosen by the then Governor of New South Wales, Lachlan Macquarie, Nichols was responsible for managing the fledgling postal service, which was an important step in organizing the colony's communication infrastructure. He started by sorting and distributing mail from his home in Sydney, which established the beginnings of a formal postal system in Australia.
Nichols played an instrumental role in the early development of the postal service in Australia, organizing the delivery of mail and coordinating the operation of post offices.