Hello Bassa,
I haven't been on Roots Chat for ages and just found your post.
Very interesting. My David Smith from Logie, Fife, emigrated to NZ with his bride Ann Henderson. Your Richard Henderson Smith may well be one of their children. Ann Henderson was born in Ceres, Fife, Scotland, and she had a brother Richard Henderson. The only other child of David and Ann that I have details of is Ellen Turbain Smith who moved to, married and died in Palmerston. David and Ann appeared to have incorporated their family surnames into naming of their children. David's mother's surname was Turbain.
The only Richard Henderson Smith I have found appeared to return to Scotland and married in Aberdeen. So do you think it's the same person?
Rgds.