New Zealand Map Series 1:
S121 769 949 (WGS84 -44.802091 167.765925)
New Zealand Map Series 260:
D41 962 875 (WGS84 -44.802143 167.766443)
Latitude and Longitude (WGS84):
44°48´ S 167°46´ E (WGS84 -44.8 167.766667)
Notes:
Details from Gibbs correspondence. Herbarium F.G. Gibbs. "Poison-mercuric chloride".