A quick multi in the Avice Hill Reserve, which is named after a founding member of the NZ Herb Society, Avice Hill.
She bequeathed this land to the city in 1989 to provide an arts and craft facility, a potters room and a herb garden, as well as protect the mature trees that were planted on the property by her great aunt.
The published co-ordinates take you to a sundial in the middle of the herb garden. On it, there is a 5 digit number PQRST under the words REG. DES
The cache is a short distance away at S 43° 29.ABA′ E 172° 33.CDE′ where
A= S+T
B=R
C=R-P
D=Q
E=P+S
Check sum A:E = 29
The container is a small pill bottle inside a slightly larger one. Please recover well.