One of multiple account books kept by Thomas S. Strong of Setauket. While there were multiple people named Thomas S. Strong, Thomas S. Strong III (1765-1840) is the most likely author (based on lifespan) for the first of these 3 account books, which is why his lifespan is used. Book III appears to be in a different handwriting than Book I and Book II. Entries refer to people working for him, and this account has a focus on cutting wood or clearing trees.