Thanks to the help of a kind 'listener' I have been able to ascertain that the above couple married in Pancras reg dist in 1867. Their son William John Henry Halsey was born in March 1870, and Charlotte, son William J.H. Halsey (1 yr) and Charlotte's young sister (Sarah Stinson, 13) were living in Hammersmith, London at time of the 1871 census. Husband William was not with them at this time, however, I believe William and Charlotte, along with young son William emigrated to NZ between 1871-1874. I'm hoping that I can connect with someone else reseaching the Halsey or Stimson/Stimpson lines. I can provide more info on this couple (from NZ onwards), but would like to track down William and Charlotte's parents.