His siblings included, Josiah, Eliza, Abigail, Maria, Margaret, and Anna.

[1] He was an abolitionist editor and also the author of a biography of his father, a romance, Wensley (1854), and The Haunted Adjutant and Other Stories (1885).

In 1833, Quincy married Lucilla P. Parker after graduating from Harvard University.

From 1839 to 1856, he was a contributor to the Liberty Bell, edited by Maria Weston Chapman for the annual anti-slavery fairs.

Quincy was also active in the Non-Resistance Society which condemned the use of force in resisting evil, renounced allegiance to human government, and because of the anti-slavery cause, favored non-union with the American South.