“I did.”  Her manner was strangely businesslike.  No show of dimples now.  “Satisfied that if any possibility remained of my ever doing this, it would have to be on the exact place of this occurrence or not at all, I embraced your suggestion and visited the house.”

“And that room no doubt.”

“And that room.  Women, somehow, seem to manage such things.”

“So I’ve noticed, Miss Strange.  And what was the result of your visit?  What did you discover there?”

“This:  that one of the blood spots marking the criminal’s steps through the room was decidedly more pronounced than the rest; and, what was even more important, that the window out of which I was looking had its counterpart in the house on the opposite side of the alley.  In gazing through the one I was gazing through the other; and not only that, but into the darkened area of the room beyond.  Instantly I saw how the latter fact might be made to explain the former one.  But before I say how, let me ask if it is quite settled among you that the smears on the floor and stairs mark the passage of the criminal’s footsteps!”

“Certainly; and very bloody feet they must have been too.  His shoes—­or rather his one shoe—­for the proof is plain that only the right one left its mark—­must have become thoroughly saturated to carry its traces so far.”

“Do you think that any amount of saturation would have done this?  Or, if you are not ready to agree to that, that a shoe so covered with blood could have failed to leave behind it some hint of its shape, some imprint, however faint, of heel or toe?  But nowhere did it do this.  We see a smear—­and that is all.”

“You are right, Miss Strange; you are always right.  And what do you gather from this?”

She looked to see how much he expected from her, and, meeting an eye not quite as free from ironic suggestion as his words had led her to expect, faltered a little as she proceeded to say: 

“My opinion is a girl’s opinion, but such as it is you have the right to have it.  From the indications mentioned I could draw but this conclusion:  that the blood which accompanied the criminal’s footsteps was not carried through the house by his shoes;—­he wore no shoes; he did not even wear stockings; probably he had none.  For reasons which appealed to his judgment, he went about his wicked work barefoot; and it was the blood from his own veins and not from those of his victim which made the trail we have followed with so much interest.  Do you forget those broken beads;—­ how he kicked them about and stamped upon them in his fury?  One of them pierced the ball of his foot, and that so sharply that it not only spurted blood but kept on bleeding with every step he took.  Otherwise, the trail would have been lost after his passage up the stairs.”

“Fine!” There was no irony in the bureau-chief’s eye now.  “You are progressing, Miss Strange.  Allow me, I pray, to kiss your hand.  It is a liberty I have never taken, but one which would greatly relieve my present stress of feeling.”