That he _is_ a discoverer is of the essence of his interest, a successful and resourceful young discoverer, even as the poor ballet-girl in “Carnival” is a tragically baffled and helpless one; so that what each of the works proposes to itself is a recital of the things discovered. Those thus brought to our view in the boy’s case are of much more interest, to our sense, than like matters in the other connection, thanks to his remarkable and living capacity; the heroine of “Carnival” is frankly too minute a vessel of experience for treatment on the scale on which the author has honoured her—she is done assuredly, but under multiplications of touch that become too much, in the narrow field, monotonies; and she leaves us asking almost as much what she exhibitionally means, what application resides in the accumulation of facts concerning her, as if she too were after all but a slice, or at the most but a slice _of_ a slice, and her history but one of the aspects, on her author’s part, of the condition of repleteness against the postulate of the entire adequacy of which we protest. So far as this record does affect us as an achieved “extract,” to reiterate our term, that result abides in its not losing its centre, which is its fidelity to the one question of her dolefully embarrassed little measure of life. We know to that extent with some intensity what her producer would be at, yet an element of the arbitrary hangs for us about the particular illustration—illustrations leaving us ever but half appreciative till we catch that one bright light in which they give out all they contain. This light is of course always for the author to set somewhere. Is it set then so much as it should be in “Sinister Street,” and is our impression of the promise of this recital one with a dawning divination of the illustrative card that Mr. Mackenzie may still have up his sleeve and that our after sense shall recognise as the last thing left on the table? By no means, we can as yet easily say, for if a boy’s experience has ever been given us for its face value simply, for what it is worth in mere recovered intensity, it is so given us here. Of all the saturations it can in fact scarce have helped being the most sufficient in itself, for it is exactly, where it is best, from beginning to end the remembered and reported thing, that thing alone, that thing existent in the field of memory, though gaining value too from the applied intelligence, or in other words from the lively talent, of the memoriser. The memoriser helps, he contributes, he completes, and what we have admired in him is that in the case of each of the pearls fished up by his dive—though indeed these fruits of the rummage are not all pearls—his mind has had a further iridescence to confer. It is the fineness of the iridescence that on such an occasion matters, and this appeal to our interest is again and again on Mr. Compton Mackenzie’s page of the happiest and the brightest.