I couldnt find her on the 1911 census either, i found gertrude her daughter but she is married to my great grandfather then and has children so not sure what happened to either Henry or Jane?
Jane is there! Your great-grandfather Edward Williams is the Head of the family. All the relationships described in the census refer back to him. So, his mother-in-law, Jane Asbury, has to be Gertrude's mother. Where or when she acquired the surname Asbury is not very clear - BMDs don't show a marriage. Also her son John Asbury, Gertrude's brother and Edward's brother-in-law, reportedly born in Leicester in 1893 can't be found in 1901 census or BMDs. There are two Astbury boys in Cottage Homes Marston Green Coleshill Warwickshire in 1901 census, William aged 11 and Tom aged 6.
But you do have the added information that Jane was born in Country Cavan Ireland, in 1853.
What a completely mysterious family!
