
I've just discovered this online story about that same Dennis family. Apparently an excerpt from a book by an uncited author, the story relates to three of John & Mary's grandchildren. The infants were buried within a couple of years of the family's arrival in Queensland, in the God's Acre Cemetery at Beatty Rd, Archerfield, Brisbane.
Another story about the same immigrant family, those who eventually settled at Brisbane's south-eastern suburb of Daisy Hill, has been published by Veronika Farley, Archivist, Queensland Memory, State Library of Queensland.
Further information about the Dennis family in Queensland, their family of origin in Cornwall and their Dennis relatives in NSW and Victoria is contained in my own book. Published in 2008, From Buryan to Bondi, the Dennis Family of West Penwith, Cornwall and some Australian Descendants is available online from BookPOD. The articles cited above add a great deal of flesh to the bones of the 'Queenslanders' in my Dennis book, and in several cases provide an updated version of death records.