“I am naturally anxious about them,” said Gordon, “in the interest of the government, of course, for I believe they hold the key to a mystery I am asked to solve.”

“You may be mistaken as to the contents of the papers,” laughed Mr. Shaw. “Well,” he added, “we will eliminate them from the matter in hand. What next, Mr. Nestor? I have great hope of your success in unraveling this mystery of the necklace.”

“With your permission,” Ned replied, “and in your presence, I would like to ask your man a few questions.”

Pedro turned a pair of venomous eyes toward the speaker for just an instant. Then he stood respectfully looking at his master again. Ned saw the movement, the quick hostility of the glance, and felt surer of his ground than before.

“He will, I am sure, be happy to answer any questions you may ask,” said Mr. Shaw.

Pedro nodded, half defiantly, as though he felt humiliated by being placed at the service, even a verbal one, of a boy, and Ned asked:

“When you saw the men at the head of the staircase, what did you say to them?”

The answer came in perfect English, yet there was a something in the voice which told as plainly as words could have done that English was not the native tongue of the speaker.

“I ordered them from the house,” he said.

“And then they attacked you?”