Having stripped the rainbow of its primary colors for titles for his annual collection of fairy-tales, Mr. Lang was forced to employ a neutral tint. Besides "The Red Fairy Book," we have had a Blue, a Yellow, a Green, and a Pink, a " Blue Poetry Book," a " Red True Story Book," and a " Red Book of Animal Stories." A " True Blue Fairy Book" should have found a place in the series; but this Grey one...