In November, Dr Alexander Collie and Lieutenant William Preston and crew from  piloted two whaleboats out of Cockburn Sound and at midday on 17 November 1829 crossed the ocean bar at present day Mandurah.
Around late autumn, Dr Alexander Collie and Lieutenant William Preston, accompanied by their crew, navigated two whaleboats from Cockburn Sound and successfully traversed the ocean bar at what is now Mandurah on November 17, 1829.