 He is also known for keeping a detailed account of the treatments of his slaves as well as his sexual relationships with them.Known as "The Diary of Thomas Thistlewood", Thistlewood's 14,000-page diary provides a detailed record of his life and deep insight into plantation life from agricultural techniques to slave–owner relations.Thistlewood was self-educated and a prolific reader for his time and even more so in British colonial society.