This historian, philosopher, and literary scholar penned numerous works spanning three centuries and covering a vast array of subjects, as attested to by his numerous works. See the list of his other works in this database, including "The English Utilitarians," "The History of English Thought in the Eighteenth Century," "Hours in a Library," "An Agnostic's Apology," and "The Science of Ethics."
These volumes, the author notes in the "Preface" are a "sequel to my History of English Thought in the Eighteenth Century."
Joseph McCabe writes about this author that he "was one of the most outspoken of the prominent literary men of the last generation." This 3 volume set contains, as the title suggests, a comprehensive account of the English utilitarians. The author describes it, in the Preface, as "a sequel to my "History of English Thought in the 18th Century."
Volume 1 covers Jeremy Bentham, Volume 2 covers, James Mill, and Volume 3 covers John Stuart Mill. The author writes about this work that "I am primarily concerned with the history of a school or sect, not with the history of the arguments by which it justifies itself in the court of pure reason. I must therefore consider the creed as it was actually embodied in the dominant beliefs of the adherents of the school, not as it was expounded in lecture-rooms or treatises on first principles. I deal not with philosophers meditating upon Being and not-Being, but with men actively engaged in framing political platforms and carrying on popular agitations."
This work, together with the "History of English Thought in the 18th Century," (see above) deserves to be called "Ithuriel's spear" in the history of 18th century English thought.