The burial was certainly at St John's at Trentham. It is in Block C, Row 33, Plot 400. Unfortunately the office lady was nearly 100 per cent sure that this block had very few headstones, mainly wooden crosses. It is stated on the information that he was buried on 11 january 1896. His age was 65 and he was a farmer from Mangaroa.(Near Upper Hutt - Look on the net about it) Hopefully the lady who 'plotted' all the burials and who is producing a data base may come up with something else, however, I do hope this information helps you.
Good luck for you continued research