Series I: Correspondence, 1761-1908, inclusive

John Alsop (1724 – 1794) was an American merchant and politician from New York City during the American Revolution. He was a delegate for New York to the Continental Congress, and the father-in-law of Rufus King. His correspondence includes letters to Philip Livingston and Thomas Wharton and a letter from his daughter, Mary Alsop King (1769 - 1819).

Rufus King (1755 – 1827) was an American lawyer, politician, and diplomat. He was a delegate for Massachusetts to the Continental Congress. He also attended the Constitutional Convention and was one of the signers of the United States Constitution. He represented New York in the United States Senate, served as Minister to Britain, and was a Federalist candidate for Vice President (1804, 1808) and later President of the United States (1816). The majority of King's correspondence is to Dr. Robert Southgate (his brother-in-law) during the revolutionary period and later to Robert Troup (1756 - 1832).

John Alsop King (1788 – 1867) was the son of Rufus King. He was a member of the New York State Assembly and later the New York State Senate. King was elected as a Whig to the 31st United States Congress. He also served a short term as Governor of New York from 1837-1838. The majority of correspondence is with his son, Charles Ray King and his brothers.

Charles King (1789 – 1867) was the son of Rufus King. He served as the ninth president of Columbia College (now Columbia University), holding the role from 1849 to 1864. The majority of correspondence is with his brother, John Alsop King.

James Gore King (1791-1853) was the son of Rufus King. After graduating from Harvard and studying law, he became a banker, and in 1818 with his brother-in-law, Archibald Gracie, Jr. established in Liverpool the firm of King and Gracie. The majority of correspondence with his father, Rufus King, and his brother, Charles King.

Lawrence Johnson (1801 – 1860) was born in England and emigrated to the United States of America in his youth. He became an eminent stereotyper and type-founder in Philadelphia and one of the most extensive and successful type-founders in the United States. He is the grandfather of Millicent (Johnson) King Lennig (1882 - 1919). The majority of correspondence is with his children.

Charles Ray King (1813 - 1901) was the son of John Alsop King and the grandson of Rufus King. He was first married to Hannah Wharton (Fisher) King in 1839, and later after her death married her sister, Nancy Wharton (Fisher) King, in 1872. He was a physician who resided in Bucks County, Pennsylvania. The majority of correspondence is with his father, John Alsop King (1788 - 1867) and his children.

Nancy Wharton (Fisher) King (1826 - d.) was the second wife of Charles Ray King and the sister of his first wife, Hannah. The majority of correspodence is between immediate family members.

Charles Frederick Lennig (1836 - 1868) was the son-in-law of Charles Ray King (1813 - 1901). Lennig married King's daughter, Mary Fisher King (1844 - 1900). Lennig was an attorney in Philadelphia, Pennsylvania. The majority of correspondence is with his wife, Mary Fisher (King) Lennig (1844 - 1900).

Mary Fisher (King) Lennig (1844 - 1900) was the daughter of Charles Ray King (1813 - 1901) and the wife of Charles F. Lennig (1836 - 1868). She lived in Philadelphia, Pennsylvania. The majority of correspondence is with her husband, Charles F. Lennig, and her father, Charles Ray King.

Millicent Gaw (Johnson) King Lennig (1874 - 1919) was the granddaughter of Lawrence Johnson (1801 - 1860) and the daughter-in-law of Charles F. Lennig (1836 - 1868) and Mary Fisher (King) Lennig (1844 - 1900). She married Rufus King Lennig (1874 - d.) in 1913 and lived in Philadelphia, Pennsylvania. All correspondence is with her cousin, Morris W. Johnson.