Daniel died during his father's lifetime, leaving an only son John, who graduated at Cambridge in 1708, and was a prominent public man in the Colony for nearly half a century. He was a Councillor, and for many years Speaker of the Lower House.
He died in 1767, at the time of the birth of his great-grandson, John Quincy Adams, who therefore received the name which he has made illustrious. Edmund, the second son, graduated in 1690, and was also in the public service almost all his life, as a magistrate, a Councillor, and one of the Justices of the Supreme Court. He was also colonel of the Suffolk Regiment, at that time a very important command, since the county of Suffolk then, and long after, included what is now County of Norfolk, as well as the town of Boston. In 1737, the General Court selected him as their agent to lay the claims of the Colony before the home government, in the matter of the disputed boundary between Massachusetts Bay and New Hampshire.
He died, however, very soon after his arrival in London, February 23, 1737, of the smallpox, which he had taken by inoculation. He was buried in Bunhill Fields, where a monument was erected to him by the General Court, which also made a grant of land of a thousand acres in the town of Lennox to his family, in further recognition of his public services.
Judge Edmund Quincy had two sons, Edmund and Josiah.
The first named, who graduated at Cambridge in 1722, lived a private life at Braintree and in Boston.
One of his daughters married John Hancock, the first signer of the Declaration of Independence, and afterwards Governor of Massachusetts. Josiah was born in 1709, and took his first degree in 1728. He accompanied his father to London in 1737, and afterwards visited England and the Continent more than once.
For some years he was engaged in commerce and ship-building in Boston, and when about forty years of age he retired from business and removed to Braintree, where he lived for thirty years the life of a country gentleman, occupying himself with the duties of a county magistrate, and amusing himself with field sports. Game of all sorts abounded in those days in the woods and along the shore, and marvellous stories have come down, by tradition, of his feats with gun and rod. He was Colonel of the Suffolk Regiment, as his father had been before him; he was also Commissioner to Pennsylvania during the old French war to ask the help of that Colony in an attack which Massachusetts Bay had planned upon Crown Point. He succeeded in his mission by the help of Doctor Franklin.
Colonel Josiah Quincy, by his first marriage, had three sons, Edmund, Samuel, Josiah, and one daughter, Hannah. His first wife was Hannah Sturgis, daughter of John Sturgis, one of his Majesty's Council, of Yarmouth. His eldest son, Edmund, graduated in 1752, after which he became a merchant in Boston. He was in England in 1760 for the purpose of establishing mercantile correspondences. He died at sea in 1768, on his return from a voyage for his health to the West Indies.
The youngest son of Colonel Josiah Quincy bore his name, and was therefore known to his contemporaries, and takes his place in history, as Josiah Quincy, Junior, he having died before his father, he was born February 23, 1744, and graduated at Harvard College, 1763. He studied law with Oxenbridge Thacher, one of the principal lawyers of that day, and succeeded to his practice at his death, which took place about the time he himself was called to the bar. He took a high rank at once in his profession, although his attention to its demands was continually interrupted by the stormy agitation in men's minds and passions, which preceded and announced the Revolution, and which he actively promoted by his writings and public speeches. On the 5th of March, the day of the so called "Boston Massacre" he was selected, together with John Adams, by Captain Preston, who was accused of having given the word of command to the soldiers that fired on the mob, to conduct his defence and that of his men, they having been committed for trial for murder. At that moment of fierce excitement, it demanded personal and moral courage to perform this duty. His own father wrote him a letter of stern and strong remonstrance against his undertaking the defence of "those criminals charged with the murder of their fellow citizens," exclaiming, with passionate emphasis, "Good God! Is it possible? I will not believe it!"
Mr. Quincy in his reply, reminded his father of the obligations his professional oath laid him under, to give legal counsel and assistance to those accused of a crime, but not proved to be guilty of it; adding: "I dare affirm that you and this whole people will one day rejoice that I became an advocate for the aforesaid criminals, charged with the murder of our fellow citizens. To inquire my duty and to do it, is my aim." He did his duty and his prophecy soon came to pass.