Find Ancestors

I'm trying to trace my mother's side of the family. She was born in Watford on 29-9-1936 and was named Vera Ann Harding. Her father was Edward Leslie Harding born in Ayelsbury on 26-10-1902 and her mother was Winifred Emma King born in Watford on 23-10-1903. My great grandfather was Edward Harding born in Chesteron Cambridge on 26-5-1857 and I would like to know who he was married to. According to the 1901 census she was 'Rose' and was 36 at the time and her birthplace was Haddenham Bucks. Can anyone tell me what her surname was. My mother thinks it was Griffin. My great great grandfather Thomas Harding was born sometime in 1833 and his wife at the time of Edward's birth was Harriet (nee Cox) and yet according to the 1901 census his wife was Elizabeth Sarah so I'd also like to know more about her also. While searching through old papers I found a letter from an Alan C.G. Harding to solicitors trying to contact my great aunt Rosalie Ethel Harding (who was Edward Leslie's older sister). He mentioned he had a sister called Pamela. Can anyone tell me more about this gentleman as he may be part of my family tree. I'd appreciate any information, no matter how trivial. Thank you. Alison Nicholls