Rose Hill Packet, was a marine craft built in Australia to serve the second place of European settlement in Australia, "Rose Hill", the furthest navigable point inland on the Parramatta River. When launched the vessel was named Prince William but was later named the Rosehill Packet by the convicts. The boat design was later called a packet (or mail) boat, because its use was that of running the first Parramatta River trade ferry, passenger, cargo, and mail service between the Sydney Cove and the Rose Hill (Parramatta) First Fleet settlements after she was launched in Sydney Cove in September and commissioned on 5 October 1789. She was the first purpose-built sailing vessel constructed in Australia. She later earned the nickname 'The Lump'.