We appear to be second cousins once removed!Like you, I amdescended from George Phimister of Wick through his daughter, Marjory Phimister (1849-1926), who married James Mitchell (1845-1903)in 1877. My grandfather was George Mitchell (1888-1937).
You ask about other children of George Phimister and Marion (or Marjory) Gunn.The IGI website records the birth of 8 children including our ancestors, David and Marjory.
This represents about as much as I know (thus far) about the family but would be very interested to learn more about your branch and anything more that you may know about the family in Wick.
I notice that the date on your note is October 2004 and so perhaps in the interim you will have already found the information on the IGI site.