“Not even an initial.  Not a mark of any kind.”

“It is empty.”

“Yes.”

“Can the girl have been robbed of its contents, here and in broad daylight?”

“Worse, Chick!” whispered Nick, between his teeth.  “Worse even than that.”

“Good heavens, Nick!  What do you mean?”

“Chick, this girl was foully murdered!”

“Murdered!” echoed Chick, with an involuntary gasp.  “Can it be possible?”

“It certainly appears so to me.”

“But the means?”

“That is the mystery.”

“There are no signs of violence.”

“Wait a bit.  Notice her right wrist, just back of the thumb and near the pulse.  Notice that tiny red spot, barely observable.  It might have been made with the point of a pin.  Do you see, it?”

“Yes, now that you call my attention to it.”

“It means something.  I am convinced of that.”

“Others are not likely to discover it.”

“I hope they may not, Chick,” Nick hurriedly rejoined.  “I am flooded with ideas and suspicions, which I wish to consider and put in order before too much of this mystery leaks out.  I’ll explain later.”

“Perhaps her hat pin is poisoned,” suggested Chick.

“I don’t think that.”

“Or possibly—­”

“Wait a moment.  Look at this box.”

“Well?”

“That wrapper was punctured while still on the box,” explained Nick.  “Notice that the pin went through the spaces in this metal design, and then through the silk lining inside.”

“Plainly enough, Nick.”

“Notice this particular puncture in the interior of the lining.”

“By Jove! there’s a faint tinge of red around it.”

“Left when the pin was withdrawn,” whispered Nick, significantly.  “Chick, it’s a tinge of blood!”

“I believe you’re right, Nick.”

“I am convinced of it.  Also that there’s a mystery here which cannot be solved in a moment,” said Nick, impressively.  “I wish to conceal these discoveries until after I have considered them more fully, and also identified this girl.  See if you can find her purse, or anything that will reveal her name.”

While Chick was thus engaged, Nick arose and glanced sharply around in search of any evidence indicating that such a crime could have been committed unobserved in so public a place.

The seat which the girl had occupied stood on the greensward, about eight feet from the gravel walk.  By several clusters of shrubbery some feet away at either side, the seat was somewhat obscured from the view of persons approaching along the walk from either direction.  Several trees cast shadows nearly over the spot, which was one very likely to have been selected by a couple desirous of being somewhat alone while resting from an afternoon stroll.

Nick quickly noted these several features, then glanced at Chick and asked: