Confirming Ambrose arrival on the John Munn (named as a signature, also noticed there's a Miss Eyles too)
http://trove.nla.gov.au/ndp/del/article/50247682 10 October 1849 Sth Aust Register.
Re what information to expect on a burial certificate issued 1850 .... ie issued before civil registrations had commenced. Firstly, it is not a death certificate, it is only a burial certificate. In Victoria and in NSW and several other states of Australia, death certificates contain not just the name of the person who has died, but the known details about that person's parents, often including nee names, occupations (of the parents) and of course if the deceased was married, the details of that marriage, any other marriages, names of the children of each marriage, how long in the colonies and many other vital family history clues.
The burial certificate should give the name of the deceased, the date of burial, and the name of the cemetery, and the name and qualifications of the person conducting the service.
As this was in Victoria, but at a time when it was still in NSW, the Rev'd ought (but often overlooked doing) to have sent a quarterly return to the NSW Chaplain for the C of E (regardless of the denomination for that Rev'd). Thus there ought (but often is not) to be an NSW Early Church Record on the NSW BDM online index.
Now, the NSW BDM online index is not always accurate, and even if the quarterly return did come from Collingwood to Sydney, then while it would have been recorded in parish records in Sydney, that does not mean that the NSW BDM received any notification (in another quarterly return, this time from that Sydney parish) of that burial. And, those Early Church Records (they start with "V" on the online index), were not reconciled when the NSW BDM did get all the ECR records back towards the late 19th Century.
BUT .... IF there is any likely burial notified via the NSW Chaplain (St Phillips, C of E, Sydney), and if that could be found at the NSWW BDM online index, then it may well help .... because ...
There may be what is often overlooked ..... a family sheet .... in the local parish back at Collingwood, and it may have been duplicated in Sydney
and that may have been filmed several decades ago .... and the film may be lodged in several States Public Libraries .. IN WHICH CASE .... the State Libraries are usually very co-operative and helpful.
Fingers crossed that this long post makes sense ....
Cheers, JM Hope the spelling is OK, have not done a spell check, jerky screen.