As the boys emerged into the street, they saw Strong hastening away in the direction of the custom house.
"Going to lose himself in the crowd," said Donald. "Don't let him get out of your sight."
"What's the matter?" asked the soldier, running to catch up with the boys. "Ugly greasers?"
"No," replied Donald, "we're shadowing a man who is wanted by Gen. Funston. That's him," pointing; "keep your eye on him."
"I thought you chaps had something on," laughed the soldier. "You can bet on me!"
Now that they approached nearer the center of the business portion of the city, there were more people on the street; but they were so near their quarry that they easily kept him in sight. Only once had he glanced back, but that was enough to convince him that he was followed.
"He's headed for somewhere," said Adrian. "He doesn't expect to get away from us simply by walking."
"Right," agreed Donald. "There he goes into the post office."
"Yes," from Adrian, "and it has two doors. You stop at the first one and I'll run to the other."
He started on a run and the soldier followed suit.