“Yes, ma’am, he’s here. He’s been here most nights lately till after twelve.”

“And is Mr. Gill with him?”

“No: Mr. Gill he went away just after I come on this evening.”

She glanced up into the cavernous darkness of the stairs.

“Is he alone up there, do you think?”

“Yes, ma’am, I know he’s alone, because I seen his men leaving soon after Mr. Gill.”

Kate lifted her head quickly. “Then I will go up to him,” she said.

The watchman apparently did not think it proper to offer any comment on this unusual proceeding, and a moment later she was fluttering and rustling up through the darkness, like a night-bird hovering among rafters. There were ten flights to climb: at every one her breath failed her, and she had to stand still and press her hands against her heart. Then the weight on her breast lifted, and she went on again, upward and upward, the great dark building dropping away from her, in tier after tier of mute doors and mysterious corridors. At last she reached Dick’s floor, and saw the light shining down the passage from his door. She leaned against the wall, her breath coming short, the silence throbbing in her ears. Even now it was not too late to turn back. She bent over the stairs, letting her eyes plunge into the nether blackness, with the single glimmer of the watchman’s lights in its depths; then she turned and stole toward her son’s door.

There again she paused and listened, trying to catch, through the hum of her pulses, any noise that might come to her from within. But the silence was unbroken—it seemed as though the office must be empty. She pressed her ear to the door, straining for a sound. She knew he never sat long at his work, and it seemed unaccountable that she should not hear him moving about the drawing-board. For a moment she fancied he might be sleeping; but sleep did not come to him readily after prolonged mental effort—she recalled the restless straying of his feet above her head for hours after he returned from his night work in the office.

She began to fear that he might be ill. A nervous trembling seized her, and she laid her hand on the latch, whispering “Dick!”