Person:Joseph Collins (31)

On the NSW BDM index search for Joseph Collins between 1870 (daughters wedding) and 1894 (daughters death), there are 17 Joseph Collins.

The first 3 on the list are unlikely due to their stated ages, of the remaining 14 I would say that the ones in the Sydney region are more likely to be correct as both of his known children are born and died in Sydney. This narrows it down to a potential 8 people however using the same criteria it may be better to check the potential options for his wife first as this can be narrowed down to 3 options.