It is not an easy task to write the life of a man who is still living. If the biographer is hostile to his subject, the slaughtering may be an exciting spectacle; if he wishes, not to lay a victim out, but to pay a tribute of admiration tempered by criticism, he has to run the risk of offending the man he admires, and all those whose admiration is in the nature of blind hero-worship. If he is conscientious, the only thing he can do is to give an honest expression of his own views, or a mosaic of the views of others which seem to him correct, knowing that he may be wrong, and that his authorities may be wrong, but challenging contradiction, and caring only for the truth as it appears to him.