Hello.
Have contacted Murray by PM. Advised of old files held by Archives NZ that may contain correspondence, and land info, re family members. Most are held at Wellington, but any that are unrestricted and held at Auckland, I may be able to look up and photograph, when the public are free to travel again. He has already received advise to consult the on line EARLY NZ BOOKS for period research into Kawhia, and it's association with coastal traders and missionaries.
Alan.