"Minnie" Stewart was indeed Margaret May Stewart's sister. Her real name was Mary Eliza Stewart. She was born 26 Jun 1885 in Wallace, Cumberland Co., NS. She was one of my Great Aunts.
Edith Cavell Roblee was born 13 Feb. 1917 in Springhill, Cumberland Co., NS.
Aletha Stewart was most definitely NOT Edith. Aletha Stewart was raised by her grandmother, and was told that she was the youngest child of her marriage to Charles Augustus Stewart. She became VERY angry when she finally learned the truth, and pretty much cut off all relations with her mother.
The person that I would MOST like to learn a lot more about is Aletha Stewart. I have pictures of her, taken when my Grandfather, Peter Norman Stewart, was visiting Nova Scotia from his home in Manitoba. I have not found anyone that knows anything about her later life.
I appreciate the information about the Lewis family.
Lynton "Bill" Stewart