Career
Born in Benton, Kentucky to James M. and Nancy Jane (Petty) Quarles, Quarles was raised in Paducah, passing through the Paducah high school and receiving some education at the Maury Academy. He read law to be admitted to the bar in 1877, practicing in McCracken County, Marshall County and Calloway County from November 1877 until October 1888, when he moved to Idaho. He first settled in Blackfoot, Idaho, but moved to Salmon, Idaho in August 1889, where he continued to practice law.
In 1896, Quarles was elected to the Idaho Supreme Court on the People"s Democratic ticket, and became chief justice on January
7, 1901. After a serving in that capacity until 1903, he voluntarily retired from the bench to resume his private practice. He practiced in Boise, Idaho, from 1903 to 1908, and then moved to Honolulu, Hawaii, where he practiced until 1911, thereafter returning to Boise.
In 1914, Quarles was nominated by President Woodrow Wilson to a seat as an Associate Justice on the Territorial Supreme Court of Hawaii, following the retirement of Justice Antonio Perry. He was confirmed by the United States Senate on March 25, 1914, and took his oath of office on April 2, 1914.