I found this information on www.familysearch.org for William Henry Howard. There are many other records for this person and possible relatives.
"Find A Grave Index," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:QVGR-6Q65 : 13 December 2015), William Henry Howard, 1927; Burial, Christchurch, Christchurch City, Canterbury, New Zealand, Barbadoes Street Cemetery; citing record ID 133050601, Find a Grave, http://www.findagrave.com.
Was your William Henry Howard from New Zealand originally or was he from elsewhere, like the US as shown in the previous answers you received above? My Howard ancestors were from several areas, (ie., Ireland, England, Bermuda, India and the US (New Jersey) as immigrants in the 1800s. If there is anything I can help you with, please let me know.