Preface vii will find them sprung from the same stem as many different-seeming characteristics of his own people. A period of confusion must fol- low, in which he will waver between contra- dictions, and his sharp outlines will become blurred with what the painters call "repen- tances." From this twilight it is hardly possible for any foreigner's judgment to emerge again into full illumination. Race-differences strike so deep that when one has triumphantly pulled up a specimen for examination one finds only the crown in one's hand, and the tough root still clenched in some crevice of prehistory. And as to race-resemblances, they are so often most misleading when they seem most instruc- tive that any attempt to catch the likeness of another people by painting ourselves is never quite successful. Indeed, once the observer has gone beyond the happy stage when sur- face-differences have all their edge, his only chance of getting anywhere near the truth is