The Affair of Mrs Seton's Child

It has struck me that many of my readers may wonder that, although I have set down in detail a number of interesting cases wherein Hewitt figured with success, I have scarcely as much as alluded to his failures. For failures he had, and of a fair number. More than once he has found his search met, perhaps at the beginning, perhaps after some little while, by an impenetrable wall of darkness through which no clue led. At other times he has lost time on a false trail while his quarry escaped. At others still the stupidity or inaccuracy of some person upon whom he has depended for information has set his plans to naught.

The reason why none of these cases have been embodied in the present papers is simply this: that a problem with no answer, a puzzle with no explanation, an incident with no satisfactory end, as a rule lends itself but poorly to purposes of popular narrative, and it is often difficult to make understood and appreciated any degree of skill and acumen unless it produces a clear and intelligible result. That such results attended Hewitt's efforts in an extraordinary degree those who have followed my narratives so far will need no assurance; but withal impossibilities still remain impossibilities, for Hewitt as for the dullest creature alive.