Port Rush Boating Disaster 1889 Davidson family research

Question

I am trying to find anyone else trying to research the Davidson family from Port Rush Scotland who have some branches here in Australia... this descendant in Australia wrote a poem about the family 

A Reminiscence Of The Portrush Lifeboat Disaster [1889] - Poem by Greg Davidson

and I am trying to link up research to the arrival and tree in Australia. 

Lis Hannelly