"Señorita Rodriguez--my hostess! Don't you see what you've made me do?

She and Mr. Cadwallader made the trip to Baltimore in his automobile,

and--and--!" She stopped. "He knows nothing of it," she added.

"Yes, I know," said Mr. Grimm.

He stood looking at her in silence for a moment, staring deeply into the

pleading eyes; and a certain tense expression about his lips passed. For

an instant her hand trembled on his arm, and he caught the fragrance of

her hair.

"Where is she now?" he asked.

"Playing bridge," replied Miss Thorne, with a sad little smile. "It is

always so--at least twice a week, and she rarely returns before two or

half-past." She extended both hands impetuously, entreatingly. "Please

be generous, Mr. Grimm. You have the gold; don't destroy her."

Señor Rodriguez, the minister from Venezuela, found the gold in his safe

on the following morning, with a brief note from Mr. Grimm, in which

there was no explanation of how or where it had been found.... And two

hours later Monsieur Boisségur, ambassador from France to the United

States, disappeared from the embassy, vanished!

XII

THE VANISHING DIPLOMATIST

It was three days after the ambassador's disappearance that Monsieur

Rigolot, secretary of the French embassy and temporary

_chargé-d'affaires_, reported the matter to Chief Campbell in the Secret

Service Bureau, adding thereto a detailed statement of several singular

incidents following close upon it. He told it in order, concisely and to

the point, while Grimm and his chief listened.

"Monsieur Boisségur, the ambassador, you understand, is a man whose

habits are remarkably regular," he began. "He has made it a rule to be

at his desk every morning at ten o'clock, and between that time and one

o'clock he dictates his correspondence, and clears up whatever routine

work there is before him. I have known him for many years, and have

been secretary of the embassy under him in Germany and Japan and this

country. I have never known him to vary this general order of work

unless because of illness, or necessary absence.

"Well, Monsieur, last Tuesday--this is Friday--the ambassador was at his

desk as usual. He dictated a dozen or more letters, and had begun

another--a private letter to his sister in Paris. He was well along in

this letter when, without any apparent reason, he rose from his desk and

left the room, closing the door behind him. His stenographer's

impression was that some detail of business had occurred to him, and he

had gone into the general office farther down the hall to attend to it.

I may say, Monsieur, that this impression seemed strengthened by the

fact that he left a fresh cigarette burning in his ash tray, and his pen

was behind his ear. It was all as if he had merely stepped out,

intending to return immediately--the sort of thing, Monsieur, that any

man might have done.

"It so happened that when he went out he left a sentence of his letter

incomplete. I tell you this to show that the impulse to go must have

been a sudden one, yet there was nothing in his manner, so his

stenographer says, to indicate excitement, or any other than his usual

frame of mind. It was about five minutes of twelve o'clock--high

noon--when he went out. When he didn't return immediately the

stenographer began transcribing the letters. At one o'clock Monsieur

Boisségur still had not returned and his stenographer went to luncheon."

As he talked some inbred excitement seemed to be growing upon him, due,

perhaps, to his recital of the facts, and he paused at last to regain

control of himself. Incidentally he wondered if Mr. Grimm was taking the

slightest interest in what he was saying. Certainly there was nothing in

his impassive face to indicate it.

"Understand, Monsieur," the secretary continued, after a moment, "that I

knew nothing whatever of all this until late that afternoon--that is,

Tuesday afternoon about five o'clock. I was engaged all day upon some

important work in my own office, and had had no occasion to see Monsieur

Boisségur since a word or so when he came in at ten o'clock. My

attention was called to the affair finally by his stenographer, Monsieur

Netterville, who came to me for instructions. He had finished the

letters and the ambassador had not returned to sign them. At this point

I began an investigation, Monsieur, and the further I went the more

uneasy I grew.

"Now, Monsieur, there are only two entrances to the embassy--the front

door, where a servant is in constant attendance from nine in the morning

until ten at night, and the rear door, which can only be reached through

the kitchen. Neither of the two men who had been stationed at the front

door had seen the ambassador since breakfast, therefore he could not

have gone out that way. _Comprenez_? It seemed ridiculous, Monsieur, but

then I went to the kitchen. The _chef_ had been there all day, and he

had not seen the ambassador at all. I inquired further. No one in the

embassy, not a clerk, nor a servant, nor a member of the ambassador's

family had seen him since he left his office."

Again he paused and ran one hand across his troubled brow.

"Monsieur," he went on, and there was a tense note in his voice, "the

ambassador of France had disappeared, gone, vanished! We searched the

house from the cellar to the servants' quarters, even the roof, but

there was no trace of him. The hat he usually wore was in the hall, and

all his other hats were accounted for. You may remember, Monsieur, that

Tuesday was cold, but all his top-coats were found in their proper

places. So it seems, Monsieur," and repression ended in a burst of

excitement, "if he left the embassy he did not go out by either door,

and he went without hat or coat!"

He stopped helplessly and his gaze alternated inquiringly between the

benevolent face of the chief and the expressionless countenance of Mr.

Grimm.

"_If_ he left the embassy?" Mr. Grimm repeated. "If your search of the

house proved conclusively that he wasn't there, he _did_ leave it,

didn't he?"

Monsieur Rigolot stared at him blankly for a moment, then nodded.

"And there are windows, you know," Mr. Grimm went on, then: "As I

understand it, Monsieur, no one except you and the stenographer saw the

ambassador after ten o'clock in the morning?"

"_Oui, Monsieur. C'est--_" Monsieur Rigolot began excitedly. "I beg

pardon. I believe that is correct."

"You saw him about ten, you say; therefore no one except the

stenographer saw him after ten o'clock?"

"That is also true, as far as I know."

"Any callers? Letters? Telegrams? Telephone messages?"

"I made inquiries in that direction, Monsieur," was the reply. "I have

the words of the servants at the door and of the stenographer that there

were no callers, and the statement of the stenographer that there were

no telephone calls or telegrams. There were only four letters for him

personally. He left them all on his desk--here they are."

Mr. Grimm looked them over leisurely. They were commonplace enough,

containing nothing that might be construed into a reason for the

disappearance.

"The letters Monsieur Boisségur had dictated were laid on his desk by

the stenographer," Monsieur Rigolot rushed on volubly, excitedly. "In

the anxiety and uneasiness following the disappearance they were allowed

to remain there overnight. On Wednesday morning, Monsieur"--and he

hesitated impressively--"_those letters bore his signature in his own

handwriting_!"

Mr. Grimm turned his listless eyes full upon Monsieur Rigolot's

perturbed face for one scant instant.

"No doubt of it being his signature?" he queried.

"_Non, Monsieur, non!_" the secretary exclaimed emphatically. "_Vous

avez_--that is, I have known his signature for years. There is no doubt.

The letters were not of a private nature. If you would care to look at

copies of them?"

He offered the duplicates tentatively. Mr. Grimm read them over slowly,

the while Monsieur Rigolot sat nervously staring at him. They, too,

seemed meaningless as bearing on the matter in hand. Finally, Mr. Grimm

nodded, and Monsieur Rigolot resumed:

"And Wednesday night, Monsieur, another strange thing happened. Monsieur

Boisségur smokes many cigarettes, of a kind made especially for him in

France, and shipped to him here. He keeps them in a case on his

dressing-table. On Thursday morning his valet reported to me that _this

case of cigarettes had disappeared_!"

"Of course," observed Mr. Grimm, "Monsieur Boisségur has a latch-key to

the embassy?"

"Of course."

"Anything unusual happen last night--that is, Thursday night?"

"Nothing, Monsieur--that is, nothing we can find."

Mr. Grimm was silent for a time and fell to twisting the seal ring on

his finger. Mr. Campbell turned around and moved a paper weight one inch

to the left, where it belonged, while Monsieur Rigolot, disappointed at

their amazing apathy, squirmed uneasily in his chair.

"It would appear, then," Mr. Grimm remarked musingly, "that after his

mysterious disappearance the ambassador has either twice returned to his

house at night, or else sent some one there, first to bring the letters

to him for signature, and later to get his cigarettes?"

"_Certainement, Monsieur_--I mean, that seems to be true. But where is

he? Why should he not come back? What does it mean? Madame Boisségur is

frantic, prostrated! She wanted me to go to the police, but I did not

think it wise that it should become public, so I came here."

"Very well," commented Mr. Grimm. "Let it rest as it is. Meanwhile you

may reassure madame. Point out to her that if Monsieur Boisségur signed

the letters Tuesday night he was, at least, alive; and if he came or

sent for the cigarettes Wednesday night, he was still alive. I shall

call at the embassy this afternoon. No, it isn't advisable to go with

you now. Give me your latch-key, please."

Monsieur Rigolot produced the key and passed it over without a word.

"And one other thing," Mr. Grimm continued, "please collect all the

revolvers that may be in the house and take charge of them yourself. If

any one, by chance, heard a burglar prowling around there to-night he

might shoot, and in that event either kill Monsieur Boisségur or--or

me!"

When the secretary had gone Mr. Campbell idly drummed on his desk as he

studied the face of his subordinate.

"So much!" he commented finally.

"It's Miss Thorne again," said the young man as if answering a question.

"Perhaps these reports I have received to-day from the Latin capitals

may aid you in dispelling that mystery," Campbell suggested, and Mr.

Grimm turned to them eagerly. "Meanwhile our royal visitor, Prince

Benedetto d'Abruzzi, remains unknown?"

The young man's teeth closed with a snap.

"It's only a question of time, Chief," he said abruptly. "I'll find

him--I'll find him!"

And he sat down to read the reports.

XIII

A CONFERENCE IN THE DARK

The white rays of a distant arc light filtered through the half-drawn

velvet hangings and laid a faintly illumined path across the

ambassador's desk; the heavy leather chairs were mere impalpable

splotches in the shadows; the cut-glass knobs of a mahogany cabinet

caught the glint of light and reflected it dimly. Outside was the vague,

indefinable night drone of a city asleep, unbroken by any sound that was

distinguishable, until finally there came the distant boom of a clock.

It struck twice.

Seated on a couch in one corner of the ambassador's office was Mr.

Grimm. He was leaning against the high arm of leather, with his feet on

the seat, thoughtfully nursing his knees. If his attitude indicated

anything except sheer comfort, it was that he was listening. He had been

there for two hours, wide-awake, and absolutely motionless. Five, ten,

fifteen minutes more passed, and then Mr. Grimm heard the grind and whir

of an automobile a block or so away, coming toward the embassy. Now it

was in front.

"Honk! Hon-on-onk!" it called plaintively. "Hon-on-onk! Honk!"

The signal! At last! The automobile went rushing on, full tilt, while

Mr. Grimm removed his feet from the seat and dropped them noiselessly to

the floor. Thus, with his hands on his knees, and listening, listening

with every faculty strained, he sat motionless, peering toward the open

door that led into the hall. The car was gone now, the sound of it was

swallowed up in the distance, still he sat there. It was obviously some

noise in the house for which he was waiting.

Minute after minute passed, and still nothing. There was not even the

whisper of a wind-stirred drapery. He was about to rise when, suddenly,

with no other noise than that of the sharp click of the switch, the

electric lights in the room blazed up brilliantly. The glare dazzled Mr.

Grimm with its blinding flood, but he didn't move. Then softly, almost

in a whisper:

"Good evening, Mr. Grimm."

It was a woman's voice, pleasant, unsurprised, perfectly modulated. Mr.

Grimm certainly did not expect it now, but he knew it instantly--there

was not another quite like it in the wide, wide world--and though he was

still blinking a little, he came to his feet courteously.

"Good morning, Miss Thorne," he corrected gravely.

Now his vision was clearing, and he saw her, a graceful figure,

silhouetted against the rich green of the wall draperies. Her lips were

curled the least bit, as if she might have been smiling, and her

wonderful eyes reflected a glint of--of--was it amusement? The folds of

her evening dress fell away from her, and one bare, white arm was

extended, as her hand still rested on the switch.

"And you didn't hear me?" still in the half whisper. "I didn't think you

would. Now I'm going to put out the lights for an instant, while you

pull the shades down, and then--then we must have a--a conference."

The switch snapped. The lights died as suddenly as they had been born,

and Mr. Grimm, moving noiselessly, visited each of the four windows in

turn. Then the lights blazed brilliantly again.

"Just for a moment," Miss Thorne explained to him quietly, and she

handed him a sheet of paper. "I want you to read this--read it

carefully--then I shall turn out the lights again. They are dangerous.

After that we may discuss the matter at our leisure."

Mr. Grimm read the paper while Miss Thorne's eyes questioned his

impassive face. At length he looked up indolently, listlessly, and the

switch snapped. She crossed the room and sat down; Mr. Grimm sat beside

her.

"I think," Miss Thorne suggested tentatively, "that that accounts

perfectly for Monsieur Boisségur's disappearance."

"It gives one explanation, at least," Mr. Grimm assented musingly.

"Kidnapped--held prisoner--fifty thousand dollars demanded for his

safety and release." A pause. "And to whom, may I ask, was this demand

addressed?"

"To Madame Boisségur," replied Miss Thorne. "I have the envelope in

which it came. It was mailed at the general post-office at half-past one

o'clock this afternoon, so the canceling stamp shows, and the envelope

was addressed, as the letter was written, on a typewriter."

"And how," inquired Mr. Grimm, after a long pause, "how did it come into

your possession?" He waited a little. "Why didn't Monsieur Rigolot

report this development to me this afternoon when I was here?"

"Monsieur Rigolot did not inform you of it because he didn't know of it

himself," she replied, answering the last question first. "It came into

my possession directly from the hands of Madame Boisségur--she gave it

to me."

"Why?"

Mr. Grimm was peering through the inscrutable darkness, straight into

her face--a white daub in the gloom, shapeless, indistinct.

"I have known Madame Boisségur for half a dozen years," Miss Thorne

continued, in explanation. "We have been friends that long. I met her

first in Tokio, later in Berlin, and within a few weeks, here in

Washington. You see I have traveled in the time I have been an agent for

my government. Well, Madame Boisségur received this letter about

half-past four o'clock this afternoon; and about half-past five she sent

for me and placed it in my hands, together with all the singular details

following upon the ambassador's disappearance. So, it would seem that

you and I are allies for this once, and the problem is already solved.

There merely remains the task of finding and releasing the ambassador."

Mr. Grimm sat perfectly still.

"And why," he asked slowly, "are you here now?"

"For the same reason that you are here," she replied readily, "to see

for myself if the--the person who twice came here at night--once for the

ambassador's letters and once for his cigarettes--would, by any chance,

make another trip. I knew you were here, of course."

"You knew I was here," repeated Mr. Grimm musingly. "And, may I--?"

"Just as you knew that I, or some one, at least, had entered this house

a few minutes ago," she interrupted. "The automobile horn outside was a

signal, wasn't it? Hastings was in the car? Or was it Blair or Johnson?"

Mr. Grimm did not say.

"Didn't you anticipate any personal danger when you entered?" he queried

instead. "Weren't you afraid I might shoot?"

"No."

There was a long silence. Mr. Grimm still sat with his elbows on his

knees, staring, staring at the vague white splotch which was Miss

Thorne's face and bare neck. One of her white arms hung at her side like

a pallid serpent, and her hand was at rest on the seat of the couch.

"It seems, Miss Thorne," he said at length, casually, quite casually,

"that our paths of duty are inextricably tangled. Twice previously we

have met under circumstances that were more than strange, and now--this!

Whatever injustice I may have done you in the past by my suspicions has,

I hope, been forgiven; and in each instance we were able to work side by

side toward a conclusion. I am wondering now if this singular affair

will take a similar course."

He paused. Miss Thorne started to speak, but he silenced her with a

slight gesture of his hand.

"It is only fair to you to say that we--that is, the Secret

Service--have learned many things about you," he resumed in the same

casual tone. "We have, through our foreign agents, traced you step by

step from Rome to Washington. We know that you are, in a way, a

representative of a sovereign of Europe; we know that you were on a

secret mission to the Spanish court, perhaps for this sovereign, and

remained in Madrid for a month; we know that from there you went to

Paris, also on a secret mission--perhaps the same--and remained there

for three weeks; we know that you met diplomatic agents of those

governments later in London. We know all this; we know the manner of

your coming to this country; of your coming to Washington. But we don't

know _why_ you are here."

Again she started to speak, and again he stopped her.

"We don't know your name, but that is of no consequence. We _do_ know

that in Spain you were Señora Cassavant, in Paris Mademoiselle

d'Aubinon, in London Miss Jane Kellog, and here Miss Isabel Thorne. We

realize that exigencies arise in your calling, and mine, which make

changes of name desirable, necessary even, and there is no criticism of

that. Now as the representative of your government--rather _a_

government--you have a right to be here, although unaccredited; you have

a right to remain here as long as your acts are consistent with our

laws; you have a right to your secrets as long as they do not, directly

or indirectly, threaten the welfare of this country. Now, why are you

here?"

He received no answer; he expected none. After a moment he went on:

"Admitting that you are a secret agent of Italy, admitting everything

that you claim to be, you haven't convinced me that you are not the

person who came here for the letters and cigarettes. You have said

nothing to prove to my satisfaction that you are not the individual I

was waiting for to-night."

"You don't mean that you suspect--?" she began in a tone of amazement.

"I don't mean that I suspect anything," he interposed. "I mean merely

that you haven't convinced me. There's nothing inconsistent in the fact

that you are what you say you are, and that in spite of that, you came

to-night for--"

He was interrupted by a laugh, a throaty, silvery note that he

remembered well. His idle hands closed spasmodically, only to be

instantly relaxed.

"Suppose, Mr. Grimm, I should tell you that immediately after Madame

Boisségur placed the matter in my hands this afternoon I went straight

to your office to show this letter to you and to ask your assistance?"

she inquired. "Suppose that I left my card for you with a clerk there on

being informed that you were out--remember I knew you were on the case

from Madame Boisségur--would that indicate anything except that I wanted

to put the matter squarely before you, and work with you?"

"We will suppose that much," Mr. Grimm agreed.

"That is a statement of fact," Miss Thorne added. "My card, which you

will find at your office, will show that. And when I left your office I

went to the hotel where you live, with the same purpose. You were not

there, and I left a card for you. And _that_ is a statement of fact. It

was not difficult, owing to the extraordinary circumstances, to imagine

that you would be here to-night--just as you are--and I came here. My

purpose, still, was to inform you of what I knew, and work with you.

Does that convince you?"

"And how did you enter the embassy?" Mr. Grimm persisted.

"Not with a latch-key, as you did," she replied. "Madame Boisségur, at

my suggestion, left the French window in the hall there unfastened, and

I came in that way--the way, I may add, that _Monsieur l'Ambassadeur_

went out when he disappeared."

"Very well!" commented Mr. Grimm, and finally: "I think, perhaps, I owe

you an apology, Miss Thorne--another one. The circumstances now, as

they were at our previous meetings, are so unusual that--is it necessary

to go on?" There was a certain growing deference in his tone. "I wonder

if you account for Monsieur Boisségur's disappearance as I do?" he

inquired.

"I dare say," and Miss Thorne leaned toward him with sudden eagerness in

her manner and voice. "Your theory is--?" she questioned.

"If we believe the servants we know that Monsieur Boisségur did not go

out either by the front door or rear," Mr. Grimm explained. "That being

true the French window by which you entered seems to have been the way."

"Yes, yes," Miss Thorne interpolated. "And the circumstances attending

the disappearance? How do you account for the fact that he went,

evidently of his own will?"

"Precisely as you must account for it if you have studied the situation

here as I have," responded Mr. Grimm. "For instance, sitting at his desk

there"--and he turned to indicate it--"he could readily see out the

windows overlooking the street. There is only a narrow strip of lawn

between the house and the sidewalk. Now, if some one on the sidewalk,

or--or--"

"In a carriage?" promptly suggested Miss Thorne.

"Or in a carriage," Mr. Grimm supplemented, "had attracted his

attention--some one he knew--it is not at all unlikely that he rose, for

no apparent reason, as he did do, passed along the hall--"

"And through the French window, across the lawn to the carriage, and not

a person in the house would have seen him go out? Precisely! There seems

no doubt that was the way," she mused. "And, of course, he must have

entered the carriage of his own free will?"

"In other words, on some pretext or other, he was lured in, then made

prisoner, and--!"

He paused suddenly and his hand met Miss Thorne's warningly. The silence

of the night was broken by the violent clatter of footsteps, apparently

approaching the embassy. The noise was unmistakable--some one was

running.

"The window!" Miss Thorne whispered.

She rose quickly and started to cross the room, to look out; Mr. Grimm

sat motionless, listening. An instant later and there came a tremendous

crash of glass--the French window in the hallway by the sound--then

rapid footsteps, still running, along the hall. Mr. Grimm moved toward

the door unruffled, perfectly self-possessed; there was only a narrowing

of his eyes at the abruptness and clatter of it all. And then the

electric lights in the hall flashed up.

Before Mr. Grimm stood a man, framed by the doorway, staring unseeingly

into the darkened room. His face was haggard and white as death; his

mouth agape as if from exertion, and the lips bloodless; his eyes were

widely distended as if from fright--clothing disarranged, collar

unfastened and dangling.

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