"Sure, sir. I can borrow Don's."
"Who is Don?"
"He's the other one of us, sir. He is still out with Lieutenant Blunt."
"Well," said the Captain, "either two of you will do. What I want is to find out to just what point the Mexican army is falling back. Do you think you can find out?"
"Sure."
"Very well. My compliments to Lieutenant Blunt and give him this order. He will pass two of you through the lines. The other can remain with him. Sergeant, their horses."
Five minutes later, both astride Adrian's horse and leading the other, they appeared at the outpost and delivered the order.
"Which two shall it be?" laughed the lieutenant as he looked the boys over.
"I guess it will have to be Adrian and Don," replied Billie ruefully. "I've had glory enough for one day. The insult to the flag has been avenged and the Stars and Stripes are floating over Vera Cruz."
"I think it's only fair that Don, as you call him, should share in the adventure," said the lieutenant, "and the sooner you go the better. It is almost sundown now."