CAIN'S BRAND that is no fact of the far past, no legend of the Middle Ages, for are there not Cains among us; white-faced, haggard-featured Cains to the last? Men who began with a little injury, and did not dream that their gripe would close in deadly persecution? Cains who slew the spirit, and through the spirit murdered the body? Cains unintentionally, whom all men free from the stain of blood, and to whom in the Jewish economy the gates of the Cities of Refuge would have stood wide open, yet who are never again light of thought and light of heart? On their heads the grey is soon sprinkled, and in the chamber of their hearts is drawn a ghastly picture, whose freshness fades, but whose distinct characters are never obliterated.