Anderson, Rose (aka Rose Flora Diantha (Tibbetts) Anderson, possibly .... (Tibbetts) Clarke

This is the grandmother I never met as she died of tuberculosis (I believe) in either 1936 or 1938, probably at Glencliff Sanitarium. This photo was taken on the Glencliff grounds. Her daughter (my mother, Jeanette May Clarke) was placed in foster homes and then at Rolf and Rumford Home in Concord, New Hampshire. I'm told my mother had a half-brother and some aunts in town but apparently they didn't want to have anything to do with her. I'm guessing Rose was not married to my mother's father, Maurice Clarke and may have still been married to Elmer Anderson when my mother was born. Times have changed and I hope there is someone willing to come forward with the family history. I have precious little information and have been unable to locate a birth certificate for my mother or even official acknowledgment she existed.