"'Greifenstein' is a remarkable novel, and while it illustrates once more the author's unusual versatility, it also shows that he has not been tempted into careless writing by the vogue of his earlier books.... There is nothing weak or small or frivolous in the story. The author deals with tremendous passions working at the height of their energy. His characters are stern, rugged, determined men and women, governed by powerful prejudices and iron conventions, types of a military people, in whom the sense of duty has been cultivated until it dominates all other motives, and in whom the principle of 'noblesse oblige' is, so far as the aristocratic class is concerned, the fundamental rule of conduct. What such people may be capable of is startlingly shown."—New York Tribune.