His Sundry Account Book chronicles his financial transactions from Newport's famed slave traders like Aaron Lopez, as well as free and enslaved people.

This nearly thirty-five-page book represents a lesser-known but fascinating example of the early African American literary tradition of the United States.

[1] Lyndon was not only an enslaved man who could read and write; his penmanship was so good that Caleb Godfrey, a noted slave ship captain, paid him to copy a lengthy letter.

[2] Caesar Lyndon's Sundry Account Book is a collection of long and short lists of numbers, persons, and events from 1761 to 1771.

Lyndon's account holders are notable slave traders, enslaved servants, and free persons in and around Newport who have come to him for various copying needs, as well as foodstuffs like celery, beets, sow pigs, leather breeches, and ketchup.