Eastman went over to the bookcase behind the Chesterfield, opened the door, swooped upon the book he wanted and stuck it under his arm. He felt perfectly certain now that something shady had been going on in Cavenaugh's rooms, and he saw no reason why he should come in for any hang-over. "Thanks. I'll send it back to-morrow," he said curtly as he made for the door. Cavenaugh followed him. "Wait a moment. I wanted you to see him. You did see his glove," glancing at the grate. Eastman laughed disagreeably. "I saw a glove. That's not evidence. Do your friends often use that means of exit? Somewhat inconvenient." Cavenaugh gave him a startled glance. "Wouldn't you think so? For an old man, a very rickety old party? The ladders are steep, you know, and rusty." He approached the window again and put it up softly. In a moment he drew his head back with a jerk. He caught Eastman's arm and shoved him toward the window. "Hurry, please. Look! Down there." He pointed to the little patch of paved court four flights down. The square of pavement was so small and the walls about it were so high, that it was a good deal like looking down a well. Four tall buildings backed upon the same court and made a kind of shaft, with flagstones at the bottom, and at the top a square of dark blue with some stars in it. At the bottom of the shaft Eastman saw a black figure, a man in a caped coat and a tall hat stealing cautiously around, not across the square of pavement, keeping close to the dark wall and avoiding the streak of light that fell on the flagstones from a window in the opposite house. Seen from that height he was of course fore-shortened and probably looked more shambling and decrepit than he was. He picked his way along with exaggerated care and looked like a silly old cat crossing a wet street. When he reached the gate that led into an alley way between two buildings, he felt about for the latch, opened the door a mere crack, and then shot out under the feeble lamp that burned in the brick arch over the gateway. The door closed after him. "He'll get run in," Eastman remarked curtly, turning away from the window. "That door shouldn't be left unlocked. Any crook could come in. I'll speak to the janitor about it, if you don't mind," he added sarcastically. "Wish you would." Cavenaugh stood brushing down the front of his jacket, first with his right hand and then with his left. "You saw him, didn't you?" "Enough of him. Seems eccentric. I have to see a lot of buggy people. They don't take me in any more. But I'm keeping you and I'm in a hurry myself. Good night."