I Drive past on occasions, but never go in for a look . Being so old many of the stones have toppled over with time and quakes.
One side is closer to the river than the other and a a main road runs through, a strange setup.
There is a story of one grave that bleeds blood from the headstone, turns out the stone was made from something that causes it to leech some kind of mineral.
If you went into the Christchurch city library site they give some history
Suzy W