The collection consists primarily of letters and documents relating to John Beatty and members of the Beatty family: John's father, the Rev. Charles Beatty, John's brothers Erkuries, Charles Clinton, and Richard, and their sister, Elizabeth. Included is correspondence with Enoch Green, Princeton Class of 1760, who was a cousin of John Beatty; Gov. Richard Howell; James McHenry; Benjamin Guild; and thirteen letters from Charles Clinton Beatty to his sister, Elizabeth. In addition, there are accounts of expenses for the College of New Jersey (now Princeton University) for money received from Samuel Stanhope Smith (treasurer); an oath abjuring Beatty's allegiance to Great Britain and affirming his allegiance to the State of New Jersey; memoranda; a mortgage document signed by Beatty and John Stockton; a document of accounts of Beatty, audited and signed by Isaac Snowden; and several handwritten notes of the genealogy of the Beatty, Green, and Guild families.