Here's the lighthouse keeper's cottage with an informative sign out front.

The "Dunbar" of 1,334 tonnes was wrecked in August 1857. It arrived at Sydney Heads on a gale
ridden night. A pilot from the Watsons Bay Pilot station would have been unable to get out through
the heads to guide the ship in, so the captain decided to seek shelter but got caught between The
Gap and Outer South Head.

This led to public opinion in Sydney demanding that a lighthouse be erected so that the entrance to
Port Jackson (Sydney Harbour) could be exactly defined for night navigation. The Hornby Light was
completed the following year.