"What is this? What is the trouble?" the second man, a short, swarthy-looking fellow, asked, joining them at this moment. "Come, the cars are about to start."

"The trouble!" his friend replied. "See; we hasten to board the train, and you forget your bag. I would rescue it for you when this fine gentleman wishes to prevent me."

"But the bag is not mine; it belongs to him," the second man replied blandly, indicating Hal with a wave of his hand.

At once the face of the first speaker changed. He smiled, showing an excellent set of teeth, and made a profuse apology.

"My dear señor, but you must pardon me," he said. "It was my error, and a grievous one indeed. A thousand pardons. Señor must have thought me a thief!"

Hal certainly did, but it was not quite wise to admit it, and as the cars were moving, he acknowledged by a curt nod the theatrical bow with which he was favored, and hurriedly exclaiming, "I am glad the matter is settled," turned on his heel and boarded the cars. But one thing struck his attention at the last moment and filled his mind with suspicion. In the hurry of replacing his hat the Spanish-looking stranger had displaced a coal-black beard, and disclosed for the fraction of a minute a clean-shaven chin. Next moment the beard was back in its place, and the two men had leaped on to the train.

"I don't like the look of those fellows," thought Hal, as he took his place beside Mr. Brindle. "It was a trick to steal the bag, and from what was said I feel sure that they know who we are, and what valuables I was in charge of. Do you happen to know either of those two men who were speaking to me on the platform?" he suddenly asked, leaning forward to address his companion.

"Do you mean those who joined the cars after you? No, I cannot say that I do; and yet something about the bearded one struck me as familiar. What about them? They seemed to me to be holding a heated conversation with you."

"They very nearly walked off with your bag," Hal answered. Then he described the facts of the case.

"Yes, it looks nasty," said Mr. Brindle at last. "It appears to me that those two are scoundrels. Strange, but one certainly seems to have a familiar face. Pshaw! It cannot be! But we must be on our guard in future."