For some reason, I thought that the first HOUGH to arrive in SA was WILLIAM HOUGH.
I have no DAVID HOUGH nor ELIZABETH.
What I did find was WILLIAM HOUGH & his wife ANN CHARLTON, who had a daughter JANE HOUGH b. 1859. That was when I thought THOMAS MOYLE had married JANE HOUGH, but you tell me she was Jane previously married to a HOUGH (can`t recall her maiden name except starts with H.....son).
Now, I will have to go & search some more!