Born: April 20, 1802, Boston, Massachusetts.
Died: January 30, 1896, Philadelphia, Pennsylvania.
Buried: Laurel Hill Cemetery, Pennsylvania, Pennsylvania.
William was the son of William Furness and Rebecca Thwing, and husband of Annis Pulling Jenks.
He graduated from Harvard University in Arts and Theology, 1820.
He served as pastor of the First Unitarian Church in Pennsylvania, Pennsylvania, for 50 years, and as pastor emeritus for 21 more.
He was an accomplished scholar, and actively worked on reforms of various kinds.