The crowd was beginning to thin considerably, as Holmes could tell by the sound of receding voices. He decided that it was about time for him to move and get his own mail, when he became aware of something dark and shapeless crouching along close under the post-office end of the building and slowly and cautiously approaching the window from which the light was streaming. At first he thought it some big dog scratching his side along the cleats of the wooden wall, but as he stood silently observing the dim shadow it was evident that no quadruped was thus warily creeping toward him. Holmes stood leaning against a storehouse platform in the deepest shade of an over-hanging roof; the figure was perhaps twelve or thirteen yards away, and, as it neared the window, the vague outlines of the mysterious creature became more easily discernible. Immediately under the beams of light that shot across the dark enclosure the figure paused; slowly raised itself; a hand went up to the head and whipped off a cap just as the crown was tinged by the gleam from within. Holmes distinctly saw the reflection of the light on the brightly polished brass of the device, but could not make out whether the device itself was the crossed rifles of the infantry or sabres of the cavalry. Then the hand was laid upon the sill, the body slowly unbent, and the head was raised until two beady eyes, under a low forehead and a crop of thick, dark hair, could peer in between the slats. One lingering scrutiny of every person and object visible in the room, then down he crouched, and, almost on all-fours, slipped away to the corner of the building, Holmes now briskly striding in pursuit. Half-way back across the court, just as he entered the beam of light, the latter's foot came down upon the edge of one of those tough and elastic hoops, such as are sure to be lying about in the yards of commissary and quartermaster storehouses, and in the twinkling of an eye it whirled up and struck him with a sharp and audible snap. In an instant the crouching figure shot to its full height and darted out of sight around the corner. When Holmes reached the front of the building, not a man in uniform was visible. Cowboys and a scout or two remained. The stage-driver was again the centre of attraction, and all were grouped about him on the low piazza. Holmes called one of the ranchmen to one side, and asked him if he had seen or heard anything of a soldier who came suddenly around the corner, but the man shook his head. Stepping inside the office he met the major and his host, Dr. Bayard, while a tall, well-formed, colored girl stood in front of the little wicket, and a number of loungers still hung about the place. The officers stopped and said they would wait until he got his letters, and, as he took his place near the window, Mrs. Griffin was just handing a little packet to the colored girl. The light fell on the topmost letter, addressed in bold, legible hand to Miss Fanny Forrest; and Holmes could plainly see the post-mark and device on the upper corner, showing that it came from the Red Cloud Agency, and old Camp Robinson. "Halloo!" thought he to himself, "I had forgotten that we were as good as cut off from them now, and they are sending around by way of Sidney and Cheyenne." Quickly the girl turned over the letters, made some laughing remark expressive of disappointment at getting nothing from her beau; then, facing Mr. Holmes and showing her white teeth, with a coquettish toss of her head accosted him: "Good-evening, Mr. Holmes. S'pose you don't know me; I'm Celestine,—Miss Forrest's girl. Miss Griffin, yere's Mr. Holmes waitin' for his mail. Ain't no use you lookin' for anything for this trash," she said, contemptuously indicating the two or three intervening frontier folks. "Han' it to me an' I'll give it to him."

But just at this moment there was a stir at the door. The loungers who had never budged an inch for Mr. Holmes drew promptly back, making way for a tall young lady, who entered, all aglow from a rapid walk, her dark eyes gleaming, her fine, mobile lips wreathed with pleasant smiles the instant she caught sight of the doctor, who, cap in hand, advanced to meet her. It was Miss Forrest herself, and behind her came her escort, the adjutant.

"I thought I heard Celestine's voice," she said, looking questioningly around; and Holmes quickly noted that the girl had suddenly slunk back behind a little group of camp-women. Finding it useless to evade the searching glance of her young mistress, the girl came forth.

"Yes, Miss Fanny. I got your letters, miss," she said, but the confident tone was gone. Holmes marked the look in Miss Forrest's flashing eye as she took the little packet with no gentle hand. He was near enough, too, to hear the low-spoken but clearly enunciated words:

"And I told you never again to touch my letters. This must be the last time."

XI.

Four days had passed since Terry's fight down the river. McLean, painfully wounded, but very quiet and plucky, had been re-established in his old quarters at "Bedlam." Dr. Bayard, after one or two somewhat formal visits, had relinquished the entire charge of the case to his assistant; so that Dr. Weeks was now the medical and surgical attendant of both the young officers in the north hall, while his senior continued assiduously to care for the wants of the feminine colony in the other. It may be said right here, that, so far as those sturdy "refugees" the Posts were concerned, professional and personal attentions from Dr. Bayard were both declared unnecessary. Mrs. Post was a woman of admirable physique and somewhat formidable personality. She did not fancy the elaborate manners of the surgeon at their first meeting, and allowed her lack of appreciation of "His Elegancy" to develop into positive dislike before she had known him a fortnight. Now, since the "north end" had become a hospital, she was willing to admit the doctor to her confidence, for the good lady was incessant in the preparation of comforting drinks or culinary dainties for the two invalids; but what was the measure of her indignation when she discovered that Bayard's attentions at "Bedlam" were confined to the south hall and to Mrs. Forrest's quarters?

He had always been a specialist in the maladies of women and children, to be sure, and we all know of what vital importance are such practitioners in our large garrisons. He was a welcome visitor either at the fireside or in the sick-room of every family homestead on the reservation—except Mrs. Post's—whensoever he chose to call, but that his presence at Mrs. Forrest's should be requisite and necessary three or four times every twenty-four hours was something Mrs. Post could not be brought to believe, and her scepticism speedily inoculated the entire community.

Mrs. Forrest declared she did not know how she could have lived through the terrors of the past week had it not been for Dr. Bayard's delicate and skilful ministrations. The doctor himself was understood to say that the poor lady's nervous system was utterly unstrung, that she was in a hyper-sensitive condition which might readily develop into nervous prostration unless she was carefully guarded. The officers of the garrison, when they spoke of the matter at all, which was not often, laughingly referred to the admirable tactics of the astute physician in finding excuses for frequent professional visits to a house where it was now apparent to all he was personally interested. The women, when they did not speak of the matter to one another, which was seldom indeed, were divided in their opinions. That Dr. Bayard was "smitten" with Fanny Forrest was something they had seen from the start, but that brilliant and most incomprehensible young woman had on more than one occasion treated him with marked coldness and aversion. What was the matter? Had he been too precipitate in his wooing? Twice since Hatton returned with his little escort, bringing in the wounded, had Miss Forrest declined Dr. Bayard's arm, and, on the other hand, while she seemed to repel the senior, she was now showing a marked interest in his junior,—the attendant of the wounded officers. Twice while Dr. Bayard was known to be visiting at the Forrests', she was seen to come forth, and, after an irresolute glance up and down the walk, as though she had no other purpose in venturing out than to escape from her elderly admirer, the young lady had walked down the path away from the officers' quarters and disappeared from view in the direction of the trader's store. Some of the ladies were beginning to believe that, faute de mieux, the doctor was consoling himself in a flirtation with his lackadaisical patient; but it was speedily noted that he stayed only a few moments when Miss Forrest left the premises, and the idea was as speedily scouted by the entire sisterhood, unless, indeed, we except the lady herself. Poor Mrs. Forrest! In these days of her faded beauty, she could not forget the fact that it was only a few years before that her rosebud complexion and tender blue eyes had been the cause of many a heartache among the young fellows in the garrison where she, the only damsel, reigned supreme; and lives there a woman who, having once queened it over the hearts of the opposite sex, can quite abandon the idea that her powers still exist?

Knowing, from plain declarations to that effect, that her spirited sister-in-law totally disapproved of Dr. Bayard after a conversation held with him the night McLean was returned to the post, Mrs. Forrest was fain to flatter herself that these frequent visits to her were impelled by an interest transcending the professional and rapidly becoming sentimental. It really did her good; gave her something to think about besides her woes; rescued her from the slatternly ways into which she was falling and restored a faded coquetry to her dress and mien; brightened her dreary eyes and lent color to her pallid cheek, and prompted her to surround herself with those domestic barricades against unhallowed glances and unwarranted sighs,—the children. But when Fanny Forrest flatly told her it was all nonsense, this encouraging Dr. Bayard's visits on account of some supposititious malady, and that she was looking better than she had seen her look in six months, the lady took offence at the first statement and alarm at the second, and between the two a relapse was accomplished which, of course, triumphantly established the justice of her position and the ineffable cruelty of her sister's charge.