"From the very first," said Fuller, "that thing struck me as being a sort of ground plan, so to speak. As you stood talking with Osborne a while ago, I got looking about. It seemed to me that Okiu's house and this one were very much of a size and that the connecting plots of ground were very long and very narrow. Here," and Fuller indicated one of the squares at the end of his drawing, "might be Okiu's house, and here," pointing to the second square, "might be that of Dr. Morse. The intervening s.p.a.ce might be the adjoining lawns."

Ashton-Kirk looked at the speaker, a curious light in his eyes.

"I wonder," said he, "how far you are from the truth?"

Fuller entered the bathroom to remove the dust from his finger-tips; and as he was toweling briskly away he caught a glimpse, through the partly open door of a closet, of a pair of soiled shoes. In an instant he had them out.

"By George," he breathed, "here's a find."

The shoes were light and made upon a slim, well-shaped last; the heels were high, the instep arched; except for a caking of yellowish looking soil about the edges of the soles they were the quintessence of feminine elegance.

"That is the color of the soil outside there," said Fuller, "and the only person in this house to whom they could belong is Miss Corbin."

Ashton-Kirk took the shoes in his hand and examined them carefully at the bathroom window, which stood open. Fuller, watching him expectantly, saw his lips forming the first words of a reply. But it was never uttered. Something without attracted him, for he put down the shoes and protruded his head from the window. The latter overlooked the north side of the house; and the secret agent leaned from it motionless for some moments.

At length, however, he drew in his head, and Fuller was surprised to see a perplexed look upon the keen face, a baffled eagerness in the singular eyes.

"What is it?" he asked.

Ashton-Kirk indicated the window silently. In turn Fuller looked out, and what he saw almost made him cry out. Okiu stood below; from a window of the room in which Nanon had said she was watching the dead leaned Stella Corbin, and the two were engaged in a low-pitched, earnest conversation.

CHAPTER X

SOME STARTLING INTELLIGENCE

The conversation between Okiu and Miss Corbin was too low voiced for Fuller to catch any of it; and in a few moments he also drew in his head.

"Well," said he, "here's a state of things. First we find tracks which might be hers, then we come upon the shoes which she might have worn when she made them, now we see her engaged in secret conversation with a man whom we know to be----"

But Ashton-Kirk with an impatient gesture stopped him.

"Indications are not proof," said he, as he went into the hall. "Don't forget that _we_ ourselves have also made tracks round about the window below, our shoes are also more or less caked with earth, and we have both spoken to Okiu."

"Of course that's so," said Fuller, "but nevertheless the facts are peculiar." He followed the other along the hall and into a room at the front of the house. "But, for that matter, everything having to do with this case is peculiar. I never saw a trail so snarled and crossed and recrossed. First you get the idea of a j.a.panese. Then Warwick is plunged into the thing so deep that I fail to see how he's ever going to extricate himself. Thirdly, we have enough proof as to Drevenoff's complicity to put him behind the bars; and now the probabilities are that the girl is also concerned."

Ashton-Kirk moved slowly about the room; it was one evidently used by Dr. Morse as a sort of lounging place, for there were sofas and big chairs and many books. At one side near the front window was a narrow antique desk of polished wood; it was open, and its contents had been tumbled about by the police. Ashton-Kirk sat down before it, annoyed and frowning.

"After an Osborne and a deputy coroner have been over the ground, one could drive a herd of mules over it without causing any appreciable difference in its aspect," said he. "They are as heavy handed as draymen."

And while he proceeded with a careful inspection of the contents of the desks, Fuller continued in a complaining tone:

"I'd like to know what we are to make of the whole business. Is it a sort of general conspiracy against Dr. Morse? Are Warwick, Miss Corbin and Drevenoff in league with the j.a.p for some particular purpose?--are there factions in the matter--each working for its own advantage?--or is every individual laboring for him or herself, and against all the others?"

"Mostly correspondence of a private nature," said Ashton-Kirk, as he ran through the papers. "Contracts with publishers, notes as to lectures, and negotiations for the delivery of the same."

There were some bits of jewelry of no particular value, a few small books of accounts and various odds and ends.

After some further search he lifted the writing bed of the desk, which was also the lid, and was about to close it; something seemed to attract his attention and he paused.

"Were you ever handed a bulky book and were surprised to find it extremely light?" said he to Fuller. "That oddity of thickness combined with lightness applies also to this lid."

The tip of the long inquiring finger ran along the edge of the lid; the quick, observant glance followed close behind. Instantly Fuller caught the suggestion.

"That's so," said he, eagerly; "it may be hollow."

"On each side of the lock," said Ashton-Kirk, "there is an inlaid strip.

Look closely and you will see slight marks at the ends of each where the point of a knife has been inserted from time to time."

As he spoke he brought his own knife into play. Out came one of the inlaid pieces, disclosing a shallow opening. But it was empty. However, the second one revealed a number of sheets of paper. With the aid of the knife blade he managed to work these out; then spreading them upon the desk the two men examined them with attention.

"h.e.l.lo," said Fuller, "here is that thing which I said a while ago looked like a ground plan."

"And here are the variously colored versions of the same, just as Warwick described them," said the secret agent. "They are precisely alike, but some are in brown, others in black, still others are in red, while some again are in blue. And here are the ones done upon neutral paper, in white."

"Is it possible, do you think," questioned Fuller, "that anything was meant by the differing colors?"

"There is nothing to convince me that such is not the case," replied Ashton-Kirk. "Chance seldom rules in a matter of consequence."

"Could the change in color not be ascribed merely to the fact that the draughtsman used the one that came first to his hand?"

"It may be. But see here: The design which you say resembles a ground plan differs in color, but is always the same in shape. But here are the other drawings. First there are a number of the crowned woman, all of which are done in brown. Then here are several duplicates of one which I saw the first time we came here. It is a cross, and in each case the down stroke is red and the cross stroke blue. Here the selection of colors never varies, and that there was a reason for clinging to these particular colors seems pretty evident. And that there was an equally good reason for changing the colors in the first design seems to me reasonable."

"Yes, it would appear so," admitted Fuller, but doubtfully. Then another sheet caught his eye and pointing to it, he inquired: "But what is _that_?"

Ashton-Kirk was reaching for the drawing when the question was asked.

The squares of paper were exactly the size of the others, but the design upon it was totally unlike, however, and was done in heavy black. It was a picture of a human heart, and transfixing it were a number of pointed weapons resembling stilettos.

"What a murderous-looking thing!" observed Fuller. "Much like a Black Hand design as ill.u.s.trated in the evening papers."

Ashton-Kirk did not reply; he bent down over the drawing as though inspecting it closely; then there was a considerable pause in which he did not stir and Fuller, watching, noted the glaze of introspection in the singular eyes. However, this was not for long; he suddenly straightened up; the other designs slowly pa.s.sed through his hands once more; then he arose, a smile upon his face.

"More than likely that is it," said he.

"Is--what?" asked Fuller.

But the other allowed the interrogation to go unheeded.

"Away somewhere in our memories," said he, "there are many little bits of information all ticketed and ready to the hand of the person who cares to reach back for them. Those people who go through life with their eyes open possess more of these items of recollection than those who refuse to look beyond the confines of their own affairs. But the impressionable person--the one who makes no conscious effort to retain the things that buzz like bees about him--and yet catches them all much like the record of a phonograph--has the greater resources to draw upon."

"I would not call you one who made no effort," said Fuller. "And things must need be more or less proven to make an impression upon you."

"I make my effort in the particular line along which my interest runs at the time," said Ashton-Kirk. "And it is true that the things which I then accept must be more or less solidly supported by facts. But a newspaper casually picked up, a novel read as a time-killer, a spoken word, the gesture of a stranger in the street, or the unstudied action of a child, may convey a something that will stay with us for life."

"And just now," said Fuller, curiously, "you came upon one of these little incidents, a sort of unattached thing, which throws some light upon these," and he pointed to the drawings upon the desk.