After his admittance to the
New York Bar, Barlow became managing clerk for his father's law firm, Shipman, Barlow, Larocque & Choate. Barlow left the firm not long after the death of his father in 1889. and as president of the
Florence Crittenton League, a reformatory primarily for prostitutes and unwed mothers. Peter T. Barlow often chose to sentence women convicted of prostitution or petty thefts to workhouses or reformatories in the belief that it would weaken their ties with the men who controlled them.
Poillon sisters Katherine and Charlotte Poillon were sisters from
Troy, New York who over several decades made headlines with their frequent lawsuits against wealthy men or fending off charges of failing to pay their debts. In 1902, Katherine Poillon filled a $250,000 breach of promise lawsuit against wealthy sportsman William Gould Brokaw, a cousin of
Irving Brokaw and later settled out of court for $17,500. Peter Barlow fell into their web in 1908 when the sisters were arrested for failing to pay several New York City hotels bills amounting to over $500. During the trial Katherine made the claim that Judge Barlow borrowed $25,000 from her and had promised to pay her hotel bills as partial payment. Later Barlow took the stand and denied her allegations, but did admit that some years earlier he had been introduced to the sisters. In an outburst during court Katherine declared their relationship had been personal and ongoing for a number of years. The Poillon sisters were eventually found guilty by the court and sent to a jail on
Blackwell Island for three months. ==Personal life==