Except for a word now and then, they waited in silence for a half hour; then a door opened and steps were heard in the hall. Both turned and saw a remarkably small man, perhaps well under five feet, dressed with great care and walking with a quick nervous step. His head was very large and partly bald, rearing above his small frame like a great, bare dome; he carried a silk hat in his hand, and peered abstractedly through spectacles of remarkable thickness.
"Locke," breathed Pendleton, as his heart paused for a moment and then went on with a leap.
The little man apparently did not see them until he was almost beside them; then he paused with a start, and his eyes grew owlish behind the magnifying lenses as he strove to make them out. That he did not recognize them seemed to worry him; his thin, gray face seemed to grow grayer and thinner; with a diffident little bow he passed on and out at the front door.
"Not a very formidable looking criminal," commented Ashton-Kirk, quietly. "However, you can seldom judge by appearances. The most astonishing crime that ever came to my notice was perpetrated by the meekest and most conventional man I had ever seen."
They waited for still another space, and then the man who had shown them in presented himself. He was now without the lantern, but wore a melancholy look.
"Dr. Mercer will see you," said he in a low voice. "He is very much vexed at being disturbed. He'll remember it against me for weeks." He appeared very much disturbed.
Ashton-Kirk placed a coin in the speaker's hand; this seemed to have a bracing effect, for he led them into his employer's presence in a brighter frame of mind. Dr. Mercer was seated at the table in his dining-room. A napkin was tucked in his collar, his fat hands were folded across his stomach, and he was breathing heavily.
"Gentlemen," spoke he, rolling his eyes around to them, "I trust you will pardon my not rising. But to exert myself after dining has a most injurious result sometimes. My digestion is painfully impaired; the slightest excitement causes me the utmost suffering."
"I appreciate the fact that we are intruding at a most inconvenient time," said Ashton-Kirk. "And I beg of you to accept our apologies."
The eyes of Dr. Mercer, which had the appearance of swimming in fat, were removed from his visitors, and fixed themselves longingly upon a great dish filled with a steaming, heavy-looking pudding. His breath labored in his chest as he replied: