Hi Juli
I've got a copy of "catalogue of Cleveland Ironstone Mines" and it gives the following:
Eston NZ 563183
Main seam 14' 6"
Pecten Seam 2' 10"
Old bank Drifts NZ 563183
New Bank Drifts NZ 566186
Trustee Drifts NZ 560180
Hope that helps
Where there's a mine or a hole in the ground.
That's where I'm heading for that's where I'm bound
So follow me down Cousin Jack
(Grateful thanks to Show of Hands)