The book "History of Thomas Ellwood, written by himself" can be called an important document of his time. Thomas Ellwood, who was a friend and follower of the famous English writer and philosopher John Milton, in his memoirs tells about his own life, faith, friendship with Milton and the events of his time. The book is a unique document of cultural and historical heritage and provides an opportunity to better understand English society of the 17th century through the lens of the author's personal experience. This work is not only an artist of literature, but also a testimony of faith and spiritual search of a person in difficult times.