"Were you present when young Burton was arrested?" asked Ashton-Kirk.

"A little," grinned the policeman, "seeing as I was the party who brought him out to the wagon."

"Did he have anything to say when accused?"

"Not much. He didn't seem surprised, though. Osborne says to him: 'We'll have to hold you in this case till we get further evidence.' And he says: 'I didn't do it. If I had thought of it, maybe I would. But I didn't do it.'"

The investigator and Bat Scanlon walked up the path; as they reached the door, it was opened for them, and they saw the burly form of Osborne standing in the hall.

"How are you?" greeted the headquarters man, good-humoredly. "Saw you from the window, and felt so honored that I'm letting you in myself." He shook Ashton-Kirk by the hand, warmly enough. "Kind of a surprise to see you down here."

The two men entered and the door closed behind them; then they made their way into the sitting-room, following Osborne. The body of the murdered man was no longer there; the rug stiffened with blood was gone; the room was now quiet and conventional--a peaceful calm filled it.

Ashton-Kirk's keen glance went about; he talked steadily to Osborne all the while, but Bat Scanlon observed that not a single detail of the apartment escaped him. The headquarters man wore a look of frank curiosity as he, too, watched the investigator, and saw him fixing the position of things in his mind.

"Just where did the body lie when the policeman arrived on the night of the crime?" he asked.

"Right here," and Osborne indicated the spot "The head was here. The wound was made with a candlestick--quite a heavy one; and the blow was meant to stop the victim for good."

"Any further marks on him besides the one on the head?"

"No," said Osborne. "We looked for something of that kind, but there was none."

Ashton-Kirk went to a window overlooking the stretch of green sod at the side of the house.

"I understand you found the candlestick just under this?"

"Yes. The window was a little open; and I guess, after he'd finished the job, the murderer wanted to get rid of the weapon. So he dropped it outside."

"Nothing to be had here," said Ashton-Kirk, after a few moments' study of the sitting-room. "At least not just now."

He threw up the window and stepped out, followed by Scanlon; standing upon the paved walk the investigator looked about. The Burton house, like the others on Duncan Street, sat fairly in the center of a plot of ground perhaps two hundred feet square. Along the division fence between that and the next house was a stretch of smooth sod, with gra.s.s, still green. At one place upon this was a sort of rose arbor, the browned, hardy shoots of a perennial twining thickly around it.

"There have been a half dozen policemen walking about here," said Ashton-Kirk, pointing to the soft earth under the window. "And that is fatal to any sort of close work, even had there been anything in the first place."

However, in spite of this, he went over every yard of the s.p.a.ce about the house; at the rose arbor he paused.

"Directly in line with the sitting-room window," he said. "No doubt young Burton placed it with that in mind; the invalid sister would love to see the roses in early summer."

He walked behind the structure, and then Bat Scanlon saw him pause suddenly and bend over, rigid with eagerness.

"What is it?" asked the big man.

For answer the criminologist pointed to the ground; sharply indented in the sod were the marks of a small, high heeled shoe; and Scanlon stood staring at them perplexed.

"What do they signify?" asked he. "There are likely to be footprints all over the place--male and female. I'll venture to say that half the residents of the street have been prowling about in this s.p.a.ce since the murder was done."

"That is a possibility always to be guarded against," said Ashton-Kirk, quietly. "But there has been a policeman on guard all the time, so, you see, the chances are greatly reduced." He studied the narrow imprints with great care; they were firmly pressed into the damp sod, the high heels making a decided puncture. "The night before last was a bright one," he added, finally, as he straightened up and looked at Scanlon.

"At about the time the murder was committed the moon hung about there, full and un.o.bstructed, if you remember. Now, suppose you, for some secret reason, entered the grounds at that time. The whole s.p.a.ce on this side was flooded with light; and yet you desired to get a view of what was going on in the sitting-room; at the same time you were most anxious not to be seen. What would you be most likely to do?"

Scanlon looked around and considered.

"About the only thing to do in a case like that," said he, "would be to take cover behind this rose arbor."

"Right!" approved the investigator. "And now, consider: once behind it, the only place from which you could fully overlook the window desired would be here," indicating a certain spot; "the vine has 'made wood' too heavily at all the other points to permit of uninterrupted vision. And right here, you will notice these footprints are the most often repeated; they are also deeper, showing that the woman, whoever she was, stood here for some little time."

Scanlon was impressed; but at the same time there was a dubious look in his eye.

"A woman _did_ stand there," he agreed; "and maybe she was looking in at the window. But what do you draw from that?"

Ashton-Kirk smiled.

"Nothing--as yet. We'll just note the fact, old chap, and pa.s.s on to the next. Later we'll put the two together, and see if any meaning is to be had from the combination."

He was silent after that, moving here and there over the ground, his head bent and his attention fixed. Scanlon chuckled as he watched him, and marveled at the similarity between the movements of his friend and those of a thoroughbred hound.

"And almost with his nose to the ground," observed Bat. "He's so fixed in what he's doing that the European war could move into the next county, and he'd never know it."

Once more the investigator came to a stop; from beneath the division fence where the gra.s.s was rather long, he picked a shining object which at once brought Bat Scanlon to his side.

"A revolver!" exclaimed the big man, amazed.

[Ill.u.s.tration: "EVERY CHAMBER LOADED"]

"With every chamber loaded," said the investigator. "It's a Smith and Wesson; it's of a small calibre, commonly called a 'ladies' revolver.'"

"Funny how it got there, ain't it?" said Bat. "For it couldn't have had anything to do with the killing of the 'Bounder,' seeing that he pa.s.sed out through being b.u.mped with a candlestick."

"Nevertheless," said Ashton-Kirk, as he slipped the weapon into his pocket, "the thing being here, and at this time, is rather interesting."

He proceeded with his inspection of the ground, striking off toward the front of the house as though following a trail. Bat lost sight of him for a few moments; then, as he, too, reached the front of the house, he saw the other standing, his hands in his pockets, a puzzled look on his face.

"Well," said Scanlon, "what now?"

"Suppose we have a look at the other side of the building," replied the other.

Here the police had also done some going to and fro; the broad foot of Osborne was distinctly marked everywhere.

"And here is the sergeant's," said Ashton-Kirk, pointing. "The policeman's shoe is not to be mistaken, and Sergeant Nailor always wears soles that have been pegged."

Under one of the windows the investigator came to a halt. It was a window smaller than any of the others and much higher in the wall.

Beneath it was a cellar opening with an iron grating.

"Look there," said the investigator, as he pointed to this latter.

Bat Scanlon looked, and saw a little ridge of mud upon one of the bars.

"From some one's foot," declared he. "It sc.r.a.ped off on the grating when they climbed up on it, maybe to reach the window."