"I went with Don Luis," replied the secretary. "Oh, by the way, Senor Hazelton, I believe some of your property has come into my possession. This is yours, is it not?"
Tisco held out a fine linen handkerchief, with an embroidered initial "H" in one corner. Harry was fond of fine linen, and effected these handkerchiefs.
"Yes; it's mine, thank you," nodded Harry, accepting the proffered bit of linen and pocketing it.
"I found it in a field, just this side of El Sombrero," remarked
Tisco, artlessly, turning away.
Though the secretary did not watch Hazelton's face, Don Luis did, and saw the slight start of surprise and the flush that came to the young engineer's face.
"You, too, have been walking then, Senor Hazelton?" inquired Don Luis, pleasantly, though with an insistence that was not to be denied.
Harry didn't know how to lie. He might have dodged the question, but he was quick enough to see that evasion would make the matter worse.
"Tom and I took a stroll last night," he admitted, indifferently.
"How far did we go, Tom?"
"Who can say?" replied Reade, lightly. "It was so dark, and the way so unfamiliar that we were glad when we got home, I know."
"They have been prowling," muttered Don Luis, sharply, under his breath. "I must have them watched."