Bachelor of Arts, Harvard, 1880.
Quincy was born in Quincy, Massachusetts on October 15, 1859 and pursued a career as a lawyer He was an unsuccessful candidate for United States. Representative from the 2nd District of Massachusetts in 1888 and served as the Massachusetts Democratic state chairman from 1891 to 1892 and 1906. He served as Mayor of Boston from 1896 to 1899.
He was an unsuccessful candidate for Governor of Massachusetts in 1901 and a delegate to Massachusetts constitutional convention in 1917.
He was an unsuccessful candidate for Massachusetts Attorney General in 1917. Quincy died on September 8, 1919 at the age of 59 years and 328 days.
Member Massachusetts House of Representatives, 1887-1888, 1890-1891. Member of and manager literature bureau of Democratic National Committee in campaign of 1892. Member Boston Transit Commission, since 1906.
Member at-large, Massachusetts Constitutional Convention, 1917 (Chairman of Commission on executives).
Married Ellen, widow of William R. Tyler, February 17, 1900 (died 1904). Married second, Mary, daughter