Adrian flipped the coin. It came down heads up.
"All right," agreed Billie. "Now for some set of signals."
"Our old Broncho Rider whistle if I need help," said Adrian. "If everything is O. K., I'll give the whip-poor-will."
Adrian slid from his horse.
"What are you doing?" asked Billie.
"I'm going afoot. I didn't spend my boyhood among the Indians for nothing. Good-bye!" and a moment later he disappeared in the fading moonlight.
"Whatever the conditions," said Billie, "we'll soon know," as he settled back in his saddle.
Running swiftly along, Adrian made straight for the barracks in which he knew would be found whatever soldiers might be in the city.
"If I find everything quiet at the barracks," was his thought, "I can go straight to where Mr. Black is stopping without fear. If I find there is any disturbance, I'll be more careful."
Ten minutes of running brought him to the barracks. All was as quiet as the hour demanded. He stood under the shadow of the back wall long enough to hear the sentry's call and then he turned in the direction of the house where the two Americans were stopping.