Could anyone help me out at all with my Fernie research?

This is what I know:

My grandad's name was Roy Fernie, born in Central Queensland (Australia) in 1925.

His father was James Bennett Fernie (1885-1968) and Roy's mother was Janet Jessie Edmonstone (1887-1970)

James Bennett Fernie's parents were David Fernie (?-?) and Mary Bennett Paterson (?-1894). They gave birth to James on the boat on the way over to Australia from Scotland. David was a warf worker and Mary was a singer.

I dont have any information on David's parents but I know that Mary's parents were William Bennett Paterson and Jane Robertson.

Any help or advice on how I could find out more would be greatly appreciated!

Thanks

Amanda (mandapanda00004@hotmail.com)