I've had a bit of a look at the separate NZPAM database of filed reports. http://data.nzpam.govt.nz/GOLD/system/mainframe.asp

You can search the mineral report section for Operator "Glass" or author "Henderson" to pick up some reports in a list, but I couldn't get any to view, as they timed out on broadband. However it would appear that the reports don't contain data on any area that the operator is holding as an EP. That can be withheld until/if the permit is relinquished no doubt. Simon Henderson has reports going back to 1977 at least, so he's no bunny.