jonw65, thank you for being so kind.
It's marvellous to have documentary evidence of the surname Fortunato on Gibraltar.
I can access the burial register you've found, however it doesn't seem to provide any details of WHERE the burial took place, it just says 'burial performed by the RC minister' or similar.
How can we find out where these burials took place, that is, in which plot of land?
The Family Search entries show the Fortunato families largely using the Cathedral in Gibraltar (St Mary's) for births & marriages, but this building doesn't seem to have a burial ground - so they must be using somewhere else... where could it be?