Mr. Gryce moved a little restlessly in his chair and stared hard at the cutter so conveniently placed under his eye.  Then his manner softened and he remarked: 

“We will do what we can.  But you must understand that the matter is not a simple one.  That, in fact, it contains mysteries which demand police investigation.  We do not dare to trifle with any of the facts.  The inspector, and, if not he, the coroner, will have to be told about these letters and will probably ask to see them.”

“They are the letters of a gentleman.”

“With the one exception.”

“Yes, that is understood.”  Then in a sudden heat and with an almost sublime trust in his daughter notwithstanding the duplicity he had just discovered: 

“Nothing—­not the story told by these letters, or the sight of that sturdy paper-cutter with its long and very slender blade, will make me believe that she willingly took her own life.  You do not know, cannot know, the rare delicacy of her nature.  She was a lady through and through.  If she had meditated death—­if the breach suggested by the one letter I have mentioned, should have so preyed upon her spirits as to lead her to break her old father’s heart and outrage the feelings of all who knew her, she could not, being the woman she was, choose a public place for such an act—­an hotel writing-room—­in face of a lobby full of hurrying men.  It was out of nature.  Every one who knows her will tell you so.  The deed was an accident—­incredible—­but still an accident.”

Mr. Gryce had respect for this outburst.  Making no attempt to answer it, he suggested, with some hesitation, that Miss Challoner had been seen writing a letter previous to taking those fatal steps from the desk which ended so tragically.  Was this letter to one of her lady friends, as reported, and was it as far from suggesting the awful tragedy which followed, as he had been told?

“It was a cheerful letter.  Such a one as she often wrote to her little protegees here and there.  I judge that this was written to some girl like that, for the person addressed was not known to her maid, any more than she was to me.  It expressed an affectionate interest, and it breathed encouragement—­encouragement! and she meditating her own death at the moment!  Impossible!  That letter should exonerate her if nothing else does.”

Mr. Gryce recalled the incongruities, the inconsistencies and even the surprising contradictions which had often marked the conduct of men and women, in his lengthy experience with the strange, the sudden, and the tragic things of life, and slightly shook his head.  He pitied Mr. Challoner, and admired even more his courage in face of the appalling grief which had overwhelmed him, but he dared not encourage a false hope.  The girl had killed herself and with this weapon.  They might not be able to prove it absolutely, but it was nevertheless true, and this broken old man would some day be obliged to acknowledge it.  But the detective said nothing of this, and was very patient with the further arguments the other advanced to prove his point and the lofty character of the girl to whom, misled by appearance, the police seemed inclined to attribute the awful sin of self-destruction.