The newcomer looked a little puzzled.
"Surely I have seen you before somewhere!" he exclaimed.
"It is very possible," Louis answered. "I am also a waiter in the café below, but I come from South America, and Mr. Delora, when he is over, is always kind to me. I spend most of my time, now that he is ill, up here looking after him."
The newcomer shook his head thoughtfully.
"What is your name?" he asked.
"Louis," was the quiet answer.
"Then, my friend Louis," the newcomer said, "understand me plainly. I am not here to be bamboozled, or to give you an opportunity for exercising any ability you may possess in the art of lying. I am here to see Delora, and if he is here, see him I will and must! If he is not here, well, it will come later. There is no roof nor any walls in London which will enclose that man and keep him from me!"
"Mr. Delora has no desire to hide himself from any one," Louis answered calmly.
"That is a statement which I may be permitted to doubt!" the visitor answered. "Is that the door of his sleeping chamber? If so, I am going in!"
He pointed to the door, through the transept of which I was looking into the sitting-room. Louis moved on one side.