Thank you so much, I think you have solved my mystery! I really do appreciate this as I had been going round and round in circles with it. If Fanny Vaughan's mother was Rook before she was married I am pretty certain these are the right people. You've made my day and I needed something to cheer me up as I am recovering from having been ill with flu! Once more thank you so much for this.
Also the family seem to talk about Royal Oak Day a lot and the Royal Oak Pub might also have a significance here.
Finally the Kings are a family which members of my family spoke of and I have an old letter which speaks of Mr and Mrs. King being visited by Thomas Rook.