There is an air of unusual excitement about the War Department this bright October day. It is only a month since the whole army seemed tramping through the streets on its way to the field of the Antietam; only three weeks since the news was received that Lee was beaten back across the Potomac, and every one expected that McClellan would be hot on his trail, eager to pursue and punish before the daring Southerners could receive accessions. But though two corps managed to reoccupy Harper's Ferry and there go into camp, the bulk of the army has remained where Lee left it when he slipped from its grasp, and McClellan's cry is for reinforcements. Three weeks of precious time slip by, and then—back come those daredevils of Stuart's, riding with laugh and taunt and jeer all around the Union forces; and there is the mischief to pay here in Washington, for if he should take a notion to pay the capital a visit on his homeward trip, what would the consequences be? Of course there are troops—lots of them—all around in the fortifications. The trouble is, that we have so few cavalry, and, after all, the greatest trouble is the old one—those fellows, Stuart and Jackson, have such a consummate faculty of making a very little go a great way. All that is known of Stuart's present move is, that he is somewhere up the Cumberland Valley; that telegraphic communication beyond McClellan's headquarters is broken, and that it is more than likely he will come hitherwards when he chooses to make his next start.

Going to the War Department to make inquiries for the provost-marshal, and show him Putnam's telegram, Major Abbot finds that official too busy to see him, "unless it be something urgent," says the subaltern, who seems to be an aide-de-camp of some kind.

"I have come to show him a despatch received last night—late—from Point of Rocks."

"You are Major Abbot, formerly—th Massachusetts, I believe, and your despatch is about the missing quartermaster, is it not?"

"Yes," replies Abbot, in surprise.

"We have the duplicate of the despatch here," says the young officer, smiling. "You would know Hollins at once, would you not?"

"Yes, anywhere, I think."

"One of the secret-service men will come in to see you this morning if you will kindly remain at your room until eleven or twelve o'clock. Pardon me, major, you saw this Doctor Warren at Frederick, did you not?"

"Yes. The evening he came out to the field hospital."

"Did he impress you as a man who told a perfectly straight story, and properly accounted for himself?"

"Why—You put it in a way that never occurred to me before," says the major, in bewilderment. "Do you mean that there was anything wrong about him?"

"Strictly entre nous, major—something damnably wrong. He was all mixed up on meeting you, we are told. He claimed to have known and been in correspondence with you, did he not?"

"Yes; he did. But—"

"That is only one of several trips he made. There are extraordinary rumors coming in about spies around Frederick, and there seems to be an organized gang. It is this very matter the general is overhauling now, and he gave orders that he should be uninterrupted until he had finished the correspondence. Will you wait?"

"Thank you, no. I believed it my duty to show him this despatch, but he knows as much as, or more than, I do. May I ask if you have any inkling of Hollins's whereabouts."

"Not even a suspicion. He simply dropped out of sight, and no man in the army appears to have set eyes on him since the night before Antietam. Colonel Putnam is investigating his accounts at Point of Hocks, and is most eager to get him."

Major Abbot turns away with a heavy weight at heart. All of a sudden there has burst upon him a complication of injustice and mystery, of annoyance and perplexity that is hard to bear. In some way he feels that the disappearance of the quartermaster is a connecting link in the chain of circumstance. He associates him, vaguely, with each and every one of the incidents which have puzzled him within the month past—with Rix, with Doctor Warren's coming, with that cold and bitter letter from Miss Winthrop, and finally with the shock and faintness that overcame this fair young girl at sight of him.

To his father he has shown Miss Winthrop's letter, and briefly sketched the visit of Doctor Warren, and the sudden meeting with his daughter the evening previous. Mr. Abbot is in a whirl of indignation over the letter, which he considers an insult, but is all aflame with curiosity about the doctor and the young lady. He has been preparing to return to Boston this very week, but is now determined to wait until he can see these mysterious people, who are so oddly mixed up in his son's affairs. It is with some difficulty that the major prevails upon him not to write to Miss Winthrop, and overwhelm her with reproaches. That letter must be answered only by the man to whom it was written, says Abbot, and it is evident that he does not mean to be precipitate. He has much to think of, and so drives back to Willard's and betakes himself to his room, where his father awaits him, and where they are speedily joined by an official of the secret service, who has a host of singular questions to ask about Hollins. Some of them have a tendency to make the young major wonder if he really has been the possessor of eyes and ears, or powers of discernment, during the past winter. Then come some inquiries about Rix. Abbot is forced to confess that he knows nothing of his antecedents, and that he was made quartermaster-sergeant at Hollins's request, at a time when nobody had a very adequate idea of what his duties might be.

"Who had charge of the distribution of the regimental mail all winter and spring?" asks the secret-service man, after looking over some memoranda.

"The quartermaster, ordinarily. The mail-bag was carried to and from the railway about thrice a week, while we were at Edward's Ferry in the fall. Rix looked after it then, and when we came down in front of Washington the matter still remained in his hands. There was never any complaint, that I can remember."

"Did any of your officers besides Mr. Hollins have civilian dress or disguise of any kind?"

"I did not know that he did—much less any of the others."

"He wore his uniform coming to the city, but would soon turn out in 'cits,' and in that way avoided all question from patrols. As he gambled and drank a good deal then, we thought, perhaps, it was a rule in the regiment that officers must not wear their uniforms when on a lark of any kind; but he was always alone, and seemed to have no associates among the officers. What use could he have had for false beard and wig?"

"None whatever that I know of."

"He bought them here, as we know, and, presumably, took them down to camp with him. If he has deserted, he is probably masquerading in that rig now. I tell you this knowing you will say nothing of it, Major Abbot, and because I feel that you have had no idea of the real character of this man, and it is time you had."

Abbot bows silently. If the detective only knew what was going on at home, how much the more would he deem the missing quartermaster a suspicious character.

Then there comes a knock at the door, and, opening it, Major Abbot finds himself face to face with the nurse whom he had seen the previous afternoon in Doctor Warren's room. She looks up into his face with a smile that betokens a new and lively interest.

"The doctor left us but a few minutes ago," she says, "and he tells me my patient is on the mend. Of course, we have said nothing to him as yet about Miss Bessie's fainting yesterday, but—I thought you might be anxious to know how they are."

"I am indeed," says Abbot, cordially, "and thank you for coming. How is Miss Warren to-day?"

"She keeps her room, as is natural after one has been so agitated, and, of course, she does not like to speak of the matter, and has forbidden my telling the doctor—her father, I mean. But he will be sitting up to-morrow, probably, and—I thought you might like to see them. He is sleeping quietly now."

"Yes, I want very much to see him, as soon as he is well enough to talk, and, if the young lady should be well enough to come out into the parlor this afternoon or take the air on the piazza, will you let me know?"

The nurse's smiles of assent are beaming. Whether she, too, has seen that photograph Abbot cannot tell. That she has had the feminine keenness of vision in sighting a possible romance is beyond question. The secret-service official is at Abbot's side as he turns back from the door.

"I shall see you again, perhaps to-morrow," he says; "meantime there is a good deal for us to do," and before the nurse has reached the sick man's door, she is politely accosted by the same urbane young man, and is by no means sorry to stop and talk with somebody about her sad-faced old patient and his wonderfully pretty daughter.

It was Abbot's purpose to devote a little time that afternoon to answering the letter received but yesterday from Miss Winthrop. It needs no telling—the fact that there had never been a love-affair in their engagement; and no one can greatly blame a woman who is dissatisfied with a loveless match. Viva Winthrop was not so unattractive as to be destitute of all possibility of winning adorers. Indeed, there was strong ground for believing that she fully realized the bliss of having at least one man's entire devotion. Whatsoever evil traits may have cropped out in Mr. Hollins's army career, she had seen nothing of them, and knew only his thoughtful and lover-like attentions while they were abroad, and his assiduous wooing on his return. Paul Abbot had never asked for her love—indeed, he had hardly mentioned the word as incidental to their engagement. Nevertheless, yielding to what she had long been taught to consider her fate, she had accepted the family arrangement—and him—and was the subject of incessant and enthusiastic congratulation. Abbot's gallant service and distinguished character as an officer had won the hearty admiration of all the circle in which she lived and moved and had her being, and she was thought an enviable girl to have won the love of so brave and so promising a man. A little more reserved and cold than ever had Miss Winthrop become, and the smile with which she thanked these many well-wishers was something wintry and weary in the last degree. If he had only loved her, there might have bloomed in her heart an answering passion that would have filled her nature, and made her proudly happy in her choice. But that he had never had for her anything more than a brother-and-sister, boy-and-girl sort of affection—a kind, careless, yet courteous tenderness—was something she had to tell herself time and again, and to hear as well from the letters of a man whose letters she should have forbidden.

Even in his astonishment at the charge brought against him, and in his indignation at the accusation of deceit, Paul Abbot cannot but feel that allowances must be made for Viva Winthrop. He meant to marry her, to be a loyal and affectionate husband; but he had not loved her as women love to be loved, and she was conscious of the lacking chord. That she had been deceived and swindled, too, by some shameless scoundrel, and made to believe in her fiancÉ's guilt, was another thing that was plain to him. She had probably been told some very strong story of his interest in this other girl. Very probably, too, Hollins was the informer and, presumably, the designer of the plot. Who can tell how deep and damnable it was, since it had been carried so far as to induce the Warrens to believe that he was the writer of scores of letters from the front? Then again, ever since he had raised that fainting girl in his arms, especially ever since the moment when her lovely eyes were lifted to his face and her sweet lips murmured his name, Paul Abbot has been conscious of a longing to see her again. Not an instant has he been able to forget her face, her beauty, her soft touch; the wave of color that rushed to her brow as he met her at her father's door when the nurse brought her, still trembling, back to the old man's bedside. He had murmured some hardly articulate words, some promise of coming to inquire for her on the morrow, and bowed his adieu. But now—now, he feels that not only Genevieve, but that Bessie Warren, too, has been made a victim of this scoundrel's plottings, and, though longing to see her and hear her speak again, he knows not what to say. It was hard enough to have to deny himself to the poor old doctor when he came out to the Monocacy. Could he look in her face and tell her it was all a fraud; that some one had stolen and sent her his picture? some one had stolen and used his name, and, whatsoever were the letters, all were forgeries? No! He must wait and see Doctor Warren, and let her think him come back to life—let her think they were his letters—rather than face her, and say it was all a lie. Yet he longs to see her once again.

But to Viva he must write without further delay. Her letter unquestionably frees him, and does it with a brusqueness that might excuse a man for accepting the situation without a word. If the engagement has ever been irksome to him it is now at an end, and he is in no wise responsible. Giving him no opportunity for denial, she has accused him of breach of faith and cast him off. Wounded pride, did he love her deeply, might now impel him to be silent. A sense of indignity and wrong might drive many a man to turn away at such a juncture, and leave to the future the unravelling of the plot. There are moments, it must be confessed, when Major Abbot is so stung by the letter that he is half disposed to take it as final, and let her bear the consequences of discovery of the fraud; but they are quickly followed by others in which he is heartily ashamed of himself for such a thought. Right or wrong, Viva Winthrop is a woman who has given her life into his hands; a woman who has been reared in every luxury only to be denied the one luxury a woman holds most precious of all. He has not been a devoted lover any more than he has been disloyal; and now that trouble has come to her, and she is deceived, perhaps endangered, Major Abbot quietly decides that the only obvious course for a gentleman to follow is to crush his pride under foot and to act and think for her. And this, after several attempts, is what he finally writes her:

It is no easy letter to write. He wants to be calm and just, and that makes it sound cold and utterly unimpassioned. Beyond doubt she would be far happier with a fury of reproaches, cutting sarcasm, and page after page of indignant denial. He also wants to be tender when he thinks of what he has not had to lavish on her in the past, and that prompts him to the little touch of sentiment at the close—a touch that is perhaps unwarranted by the facts in the case. There is a third matter, one that he does not want to mention at all, a name he hates to put on any page addressed to her; but he knows that it is due her she should be told the truth, and at last, just as sunset is coming, he adds a postscript:

He is still pondering over this when his father comes in for a word or two.

"I am going over to call at Doctor Warren's room and ask how he is. Possibly he may be able to see me. Have you written to—"

And he stops. He does not feel like saying "Viva" to or of the girl who has so misjudged his boy.

Abbot holds up the letter and its addressed envelope.

"Yes, and it must go at once or miss the mail."

"I'll post it for you, then, as I have to go to the office a moment," is the answer, and the elder stands looking at his son, while the latter quickly scans the last page, then folds and encloses it. Paul smiles into his father's eyes as he hands it, and the letter-bearer goes briskly away.

His footsteps have hardly become inaudible when there is a tap at the door, and behold! the nurse.

"You told me you would like to know when Miss Warren came out, major. She is on the veranda now."

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