All through the sixties this misapprehension of purpose and aim persisted, and toward 1870 another riddle was presented with the appearance of the nocturnes. They were things done along the Thames at dusk and were revelations of that blue-air envelope which forms when the shadow of the world begins to creep up the Eastern sky. The idea had perhaps been suggested to Whistler in the color prints of Hiroshige and he had afterward found its reality in English twilights. Such a motive was quite the opposite of Turner’s blazing sunset upon which the generations had been reared. Everything was muffled, vague in outline, half seen as to place. Much was left to the imagination, and as for the composition, it was arranged with the greatest simplicity. Indeed, it was so simple that people thought it must be foolish and said so without hesitation. Again the subtitles of “Blue and Gold” and “Black and Gold” carried no meaning. Even the experienced Ruskin could see nothing in the later “Falling Rocket” but “a coxcomb flinging a pot of paint in the public’s face.” It was “cockney impudence” and “wilful imposture.” That was more than Whistler could stand, and he began a libel suit against Ruskin in the course of which the Attorney-General of England said he “did not know when so much amusement had been afforded the British public as by Mr. Whistler’s pictures.” The trial was a farce and the laugh went against Whistler. But he laughs best who laughs last, and it has not been the British public that has done the latest laughing. There had been merriment before that, and--incredible as it may seem--over Whistler’s now celebrated portrait of his mother. It was admitted to the Royal Academy Exhibition of 1872 only after a well-known academician had threatened to resign if it were rejected. It was not wanted, but having been received, it was treated as a joke. London revised its opinion about the portrait later on. After the French Government bought it for the Luxembourg it was thought, even by the hosts of Philistia, to be Whistler’s best effort, and there was much talk of its refined motherly spirit and decent air--praises that the painter resented, telling the public that the sitter was no affair of theirs and that their only interest should be in “the arrangement in gray and black.”