Miss Eileen Clemow, part of the well to do Ottawa family in the late 19th and early 20th century, was considered quite a beauty of her time when this photo was taken in 1902 when she was 21. She was granddaughter of Senator Francis Clemow and the niece of Adelaide Clemow.
But in 1907, after a prolonged illness, and after a previous attempt to poison herself, she shot herself with a revolver. It was reported that she might have done so because she had been jilted after being engaged to a prominent politician. You can read more of the tragic story here.