Mark soon noticed that a good many Confederate officers were making their way north, and he learned that a gigantic conspiracy was on foot, but, being only a private soldier, he was not taken into their confidence.

One day there came to the house on his way north the same Colonel Clay spoken of in our first chapter. He noticed and asked about Mark, and, when told, exclaimed, "Remarkable! I would like to speak to him."

He made Mark tell him the whole story. Not only this, but by questioning he learned that Mark had not only a keen knowledge of military affairs but was wonderfully well informed as to the army.

"It's a shame you were kept in the ranks. You should be an officer," cried Clay.

"All can not be officers, and I was content to serve my country in the most humble capacity," modestly replied Mark. "Alas! I am afraid I can serve her no more." And he touched his wounded arm.

"I don't know about that," said Colonel Clay. "You may be able to serve your country even in a greater capacity than you yet have. I have some important documents which I would like to get into St. Louis to certain parties. I will not deny that if you were caught with them on your person it would be certain death; but I believe you are both brave and shrewd."

"The boy is not able," spoke up Mr. Chittenden. "He has not been out of bed more than a week. His wounds are not healed yet."

"So much the better," said Clay. "If he can ride, he can get through where a well man can not."

"I will go. A man can die but once, and it is for my country." As Mark said this his eyes fairly seemed to shine.

"Bravely spoken, my lad," cried Clay. "Would we had more like you!"