Have checked incoming passenger lists in Aus , and can't find any Edwin arriving in Sydney , Moreton Bay , Adelaide , Newcastle or Melbourne . Re John and Mary :
John 28 and Mary 23 Wade arrived Melbourne Jan 1854 on Vessel Omega .
A Mary Wightman arr April 1855 aged 27 on Vessel Sir Charles Napier .
A John and William Wade arrived on vessel Joseph Somes Sept 1847 , both aged 17 .
Hope this helps ,
David Dwyer
Sydney , Australia