For five years, ever since her father brought her from the convent at St. Louis, Mary Cahill had watched officers come and officers go. Her knowledge concerning them, and their public and private affairs, was vast and miscellaneous. She was acquainted with the traditions of every regiment, with its war record, with its peace-time politics, its nicknames, its scandals, even with the earnings of each company-canteen. At Fort Crockett, which lay under her immediate observation, she knew more of what was going forward than did the regimental adjutant, more even than did the colonel's wife. If Trumpeter Tyler flatted on church call, if Mrs. Stickney applied to the quartermaster for three feet of stovepipe, if Lieutenant Curtis were granted two days' leave for quail-shooting, Mary Cahill knew it; and if Mrs. “Captain” Stairs obtained the post-ambulance for a drive to Kiowa City, when Mrs. “Captain” Ross wanted it for a picnic, she knew what words passed between those ladies, and which of the two wept. She knew all of these things, for each evening they were retailed to her by her “boarders.” Her boarders were very loyal to Mary Cahill. Her position was a difficult one, and had it not been that the boy-officers were so understanding, it would have been much more difficult. For the life of a regimental post is as circumscribed as the life on a ship-of-war, and it would no more be possible for the ship's barber to rub shoulders with the admiral's epaulets than that a post-trader's child should visit the ladies on the “line,” or that the wives of the enlisted men should dine with the young girl from whom they “took in” washing. So, between the upper and the nether grindstones, Mary Cahill was left without the society of her own sex, and was of necessity forced to content herself with the society of the officers. And the officers played fair. Loyalty to Mary Cahill was a tradition at Fort Crockett, which it was the duty of each succeeding regiment to sustain. Moreover, her father, a dark, sinister man, alive only to money-making, was known to handle a revolver with the alertness of a town-marshal. Since the day she left the convent Mary Cahill had held but two affections: one for this grim, taciturn parent, who brooded over her as jealously as a lover, and the other for the entire United States Army. The Army returned her affection without the jealousy of the father, and with much more than his effusiveness. But when Lieutenant Ranson arrived from the Philippines, the affections of Mary Cahill became less generously distributed, and her heart fluttered hourly between trouble and joy.