A crude ladder against the wall of a roomy stope beyond the door did not in the least surprise him. He had expected something of this sort. When he had topped the ladder and found himself in a chamber that stretched away into blackness, he grunted again his mental confirmation of a theory working out beautifully in fact. His candle held close to the wall, he moved forward along the well-trodden path, looking for a door. Mechanically he noticed also the formation of the wall and the vein of ore--probably high-grade in pockets, at least--that had caused this chamber to be dug. The ore, he judged, had long since been taken out and down through the stope into the tunnel and so out through the main portal. These workings were old and for mining purposes abandoned. But just now Casey was absorbed in solving the one angle of the mystery which he had stumbled upon at first, and he gave no more than a glance and a thought to the silent testimony of the rock walls. He found the door, fastened also on the outside just as he had expected it would be. Beside it stood a rather clever heating apparatus which Casey did not examine in detail. His Irish heart was beating rather fast while he unfastened the door. Beyond that door his thoughts went questing eagerly but he hesitated nevertheless before he lifted his knuckles and rapped. There was no reply. Casey waited a minute, knocked again, then pulled the door open a crack and looked in. The old woman sat there rocking back and forth, steadily, quietly. But her thin fingers were rolling a corner of her apron hem painstakingly, as if she meant to hem it again. Her eyes were fixed absently upon the futile task. Casey watched her as long as he dared and cleared his throat twice in the hope that she would notice him. But the old woman rocked back and forth and rolled her apron hem; unrolled it and carefully rolled it again. "Good morning, ma'am," said Casey, clearing his throat for the third time and coming a step into the room with his candle dripping wax on the floor. For just an instant the uneasy fingers paused in their rolling of the apron hem. For just so long the rockers hesitated in their motion. But the old woman did not reply nor turn her face toward him; and Casey pushed the door shut behind him and took two more steps toward her. "I come to see if yuh needed anything, ma'am; a friend, mebbe." Casey grinned amiably, wanting to reassure her if it were possible to make her aware of his presence. "They had yuh locked in, ma'am. That don't look good to Casey Ryan. If yuh wanta get out--if they got yuh held a prisoner here, or anything like 'that, you can trust Casey Ryan any old time. Is--can I do anything for yuh, ma'am?" The old woman dropped her hands to her lap and held them there, closely clasped. Her head swung slowly round until she was looking at Casey with that awful, fixed stare she had heretofore directed at the wall or the floor.