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 November time in 1829, Dr Alexander Collie and Lieutenant William Preston, along with their crew, successfully crossed the ocean bar from Cockburn Sound to what is now Mandurah using two whaleboats.