There was a pause between the two figures of the dance. Joe had taken his partner's fan, which he was gently waving to and fro before her face. She stood panting with affected exhaustion, glancing archly at her new "young man" from under studiously fluttering eyelids. The gaunt father, having stopped waltzing, had discovered that the woollen-clad baby was fast asleep on his shoulder. Over in another corner, under a window, was a red-faced cowboy, slumbering as tranquilly as the baby, his head sunk on his breast, a genial forelock waving lightly in the breeze. The fiddlers resumed their function. "Swing your pards!" cried the curly-headed boy; and once more all was commotion. The room seemed hot and crowded. Lem had shifted his position, and was standing opposite the windows. He looked toward them, and his glance was arrested. In the square of light cast outside by the lamps within was a sinister, malignant face. It was the face of a man whom the Keith boys had seen to-night for the first time. He had paid his seventy-five cents, and had received his numbered ticket like the others, by which simple ceremony all the requirements of ranch etiquette were fulfilled. Bub Quinn they called him--Bub Quinn from the Divide. Rather a nice-looking fellow, the brothers had agreed, attracted by his brilliant smile and hearty hand-shake. It was Bub Quinn who had brought the girl that Joe was dancing with, and now that Lem came to think of it, he could not remember having seen her dance with any one else, besides Quinn himself. Lem's heart gave a heavy thump almost before his brain had grasped the situation. Yet the situation was very plain. It was Joe and his little fool of a partner that those malignant eyes were following. They were light eyes, looking out from under level light eyebrows, and Lem frankly quaked at sight of them. The man's face was clean-shaven, showing high cheekbones and a firm, handsome mouth. He stood in an indolent attitude, with his hands in his pockets; but all the reckless passion of the desperado was concentrated in the level glance of those menacing eyes. "Meet your partner with a double _sashay_," cried the curly-headed boy. Diddle-diddle-dee squeaked the fiddles. Lem looked again at his brother. He was flirting outrageously. A door opened behind Lem, and a woman called him by name. He stepped into the kitchen, where two of his prairie neighbors were busy with the supper. It was Mrs. Luella Jenkins who had summoned him, kind, queer, warm-hearted Mrs. Luella. The "Keith boys" were giving their first dance, and she had undertaken to engineer the supper. "We've got the coffee on," she remarked, pointing over her shoulder at a couple of gallon-cans on the stove, from which an agreeable aroma was rising. "That's first-rate," said Lem, who had a much more distinct vision of Bub Quinn's eyes than of the mammoth tin cans. "Is there anything I can do to help?"