Hello, Fiona, please also see my message to Shelagh in this thread where I have listed the children that I think are correct. I also answer your question about the 1841 census in that message. I know that Emma's father is James Gardiner from her baptism on 8 Oct 1809 in Redbrook, Newland Parish, Gloucestershire. Her mother is listed only as Sarah. Her surname, James, comes from the baptism of her son Samuel. on 25 Jan 1823.
Please tell me why you are researching this family? Emma Gardiner and Robert Martin are my great great grandparents. Thank you. Shirley