The author of The Methods of Ethics, FTP, identify this philosopher and proponent of utilitarianism.
He was one of the founders and first president of the Society for Psychical Research, and his sister was married to the Archbishop of Canterbury.  Later works of this philosopher include Philosophy, Its Scope and Relations and Outlines of the History of Ethics for English Readers, though he is most famous for his first major work.  The developer of the wages fund theorem, he attempted to reconcile the principles of John Stuart Mill with his "intuitional" theory of ethics.  The author of The Methods of Ethics, FTP, identify this philosopher and proponent of utilitarianism.
He was one of the founders and first president of the Society for Psychical Research, and his sister was married to the Archbishop of Canterbury.  
Henry Sidgwick