"He had read almost every important book on these subjects and, although he had not Acton's miraculous visual memory for books, he never forgot what he read and always had the facts ready in his mind. His Introduction to Political Science has remained what it was on publication, the best book on the subject. Though not a professed Shakespearean scholar, he had the bulk of Shakespeare's plays so incrusted in his memory that he hardly ever had need to refer to the text and was the originator of more than one illuminating emendation. His knowledge of mediæval and of classical history was complete: it was superior to Acton's in that to him they were always living subjects... On balance, and saving alone modern history in its fullest sweep, I am driven to the conclusion that my father's learning was barely, if it all, less than that of so renowned a man as Acton and in some respects greater."