Blue cloth and brass buttons moved conspicuously in the van, a grim face flushed and perspiring beneath the helmet's vizor, a revolver poised menacingly in one hand, locust as ready in the other. Behind this outward and visible manifestation of the law's majesty bobbed a rusty derby, cocked jauntily back upon the red, shining forehead of a short and thick-set person with a black mustache. O'Hagan's agitated countenance loomed over a dusty shoulder, and the battered silk hat of the nighthawk brought up the rear. "Come in, everybody," Maitland greeted them cheerfully, turning back into the study and tossing the revolver, shreds of smoke still curling up from its muzzle, upon a divan. "O'Hagan," he called, on second thought, "jump down-stairs and see that all New York doesn't get in. Let nobody in!" As the janitor unwillingly obeyed, policeman and detective found their tongues. A volley of questions, to the general purport of "What's th' meanin' of all this here?" assailed Maitland as he rested himself coolly on an edge of the desk. He responded, with one eyebrow slightly elevated: "A burglar. What did you suppose? That I was indulging in target practice at this time of night?" "Which way'd he go?" "Back of the flat--through the window to the fire-escape, I suppose. I took a couple of shots after him, but missed, and inasmuch as he was armed, I didn't pursue." Hickey stepped forward, glowering unpleasantly at the young man. "Yeh go along," he told the uniformed man, "'nd see 'f he's tellin' the truth. I'll stay here 'nd keep him company." His tone amused Maitland. In the reaction from the recent strain upon his wits and nerve, he laughed openly. "And who are you?" he suggested, smiling, as the policeman clumped heavily away. Hickey spat thoughtfully into a Satsuma jardinière and sneered. "I s'pose yeh never saw me before?" Maitland bowed affirmation. "I'm sorry to say that that pleasure has heretofore been denied me." "Uh-huh," agreed the detective sourly, "I guess that's a hot one, too." He scowled blackly in Maitland's amazed face and seemed abruptly to swell with mysterious rage. "My name's Hickey," he informed him venomously, "and don't yeh lose sight of that after this. It's somethin' it won't hurt yeh to remember. Guess yer mem'ry's taking a vacation, huh?" "My dear man," said Maitland, "you speak in parables and--if you'll pardon my noticing it--with some uncalled-for spleen. Might I suggest that you moderate your tone? For," he continued, facing the man squarely, "if you don't, it will be my duty and pleasure to hoist you into the street." "I got a photergrapht of yeh doing it," growled Hickey. "Still, seeing as yeh never saw me before, I guess it won't do no harm for yeh to connect with this." And he turned back his coat, uncovering the official shield of the detective bureau. "Ah!" commented Maitland politely. "A detective? How interesting!"