the cul-de-sac resolving itself at the very last moment into a promising corridor toward the outer air. At every rebuff it is my happiness to be hopelessly bewildered; and I gape with admiration when the Gordian knot is untied. If the author be old-fashioned enough to apostrophize the Gentle Reader, I know he must mean me, and docilely give ear, and presently tumble head-foremost into the treacherous pit he has digged for me. In brief, I am there to be sold, and I get my money’s worth. No one can thoroughly enjoy riddle stories unless he is old enough, or young enough, or, at any rate, wise enough to appreciate the value of the faculty of being surprised. Those sardonic and omniscient persons who know everything beforehand, and smile compassionately or scornfully at the artless outcries of astonishment of those who are uninformed, may get an ill-natured satisfaction out of the persuasion that they are superior beings; but there is very little meat in that sort of happiness, and the uninformed have the better lot after all. I need hardly point out that there is a distinction and a difference between short riddle stories and long ones—novels. The former require far more technical art for their proper development; the enigma cannot be posed in so many ways, but must be stated once for all; there cannot be false scents, or but a few of them; there can be small opportunity for character drawing, and all kinds of ornament and comment must be reduced to their very lowest terms. Here, indeed, as everywhere, genius will have its way; and while a merely talented writer would deem it impossible to tell the story of “The Gold Bug” in less than a volume, Poe could do it in a few thousand words, and yet appear to have said everything worth saying. In the case of the Sherlock Holmes tales, they form a series, and our previous knowledge of the hero enables the writer to dispense with much description and accompaniment that would be necessary had that eminent personage been presented in only a single complication of events. Each special episode of the great analyst’s career can therefore be handled with the utmost economy, and yet fill all the requirements of intelligent interest and comprehension. But, as a rule, the riddle novel approaches its theme in a spirit essentially other than that which inspires the short tale. We are given, as it were, a wide landscape instead of a detailed genre picture. The number of the dramatis personae is much larger, and the parts given to many of them may be very small, though each should have his or her necessary function in the general plan. It is much easier to create perplexity on these terms; but on the other hand, the riddle novel demands a power of vivid character portrayal and of telling description which are not indispensable in the briefer narrative. A famous tale, published perhaps forty years ago, but which cannot be included in our series, tells the story of a murder the secret of which is