Mary Grace Quackenbos

Mary Grace Quackenbos Humiston (née Winterton) (1869–1948) was the first female Special Assistant United States Attorney. She was a graduate of the New York University School of Law and was a leader in exposing peonage in the American South. She was also known as "Mrs. Sherlock Holmes", starting with her work solving the cold case of Ruth Cruger, who disappeared in New York in 1917.

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• No wonder old graybeards of the New Jersey bar are shaking their heads in amazement over the woman's feat! NO wonder New York lawyers are asking each other about this enterprising young person! She is rather worth thinking about.
  • "Woman's Fight Against Big Odds for Mrs. Tolla". New York, N.Y.. 13 January 1906. pp. 3. Retrieved on 9 October 2019.