I see by this article in Paperspast the inquest was held at the Oretia (probably now called Oratia) Hotel
http://www.rootschat.com/links/0l5m/ It also says he was travelling from the Henderson railway station to his residence,I suspect the minister probably travelled to Henderson to conduct the service.
It may be worth contacting the office at Waikumete Cemetery and asking them about the cemeteries mentioned in the previous thread,I know Swanson has some old graves at the front.
Another thing you could do is to have a good look on G**gle maps around the area he lived,I have found small cemeteries that way,
Cheers Janette