It was terrific to get an almost instant response after such a long break since the thread was started.
As I thought your Moulden/Boisen background is doubly interesting & in more ways than you may realize.
I had begun researching the Moulden side of my family but am discovering that the Moulden name is not as easy to trace as my other family lines.I can't even tell if Mouldens are English, Irish or Scots (am guessing English from the mid to southern counties).
I did notice there were quite a few Mouldens in NZ in a recent scan of the NZ BDM Archives.
Anyway, in regard to the Boisen line, your grandfather and my grandmother were 1/2 brother & sister. They knew each other very well. This has been quite an amazing discovery for me.
I'll contact you directly from now on and please feel free to contact me directly.