In 1883, he moved to Middletown, Connecticut, and worked as a bookkeeper until 1890, when he began to study law.
[1] Haines "studied in the law office of M. Eugene Culver for two years and then persuaded Dean Francis Wayland to permit him to enrol as a senior in Yale Law School,[1] from which Haines graduated in 1893.
Haines entered into a partnership with Culver until 1895, when he became executive secretary to Governor Owen Vincent Coffin, until 1897.
[1] He returned to the practice of law, including periods as Middlesex County liquor prosecutor, and state's attorney.
[3] Haines died in Middlesex Memorial Hospital in Middletown at the age of 92, after a lengthy illness.