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Here is mention of ISAAC DELBRIDGE the second son of EDWARD DELBRIDGE snr.
http://trove.nla.gov.au/ndp/del/article/5694722?searchTerm="isaac delbridge"
I had contact with a descendant of Isaac Delbridge and his first wife Harriet Baldwin. Her grandfather was Rev. Frederick Delbridge, son of Isaac & Harriet Delbridge.
This was quite a few years ago now. However I do remember she mentioned that the 'Delbridge' family was mentioned in a book (can't remember the name of it now). I seem to recall that I was able to find a copy at my local library, when I'm there tomorrow I'll see if I can find it again. It just may have some information about their voyage to Australia.
Sarra
