In the month of May, 1862, a young Federal officer reported in St. Louis, and found himself without a command, and without a commission. This officer, Captain Lawrence Middleton, had greatly distinguished himself during the first year of the war on the staff of General Nathaniel Lyon. After the death of Lyon he was commissioned a captain by General Fremont, and authorized to raise an independent company of scouts. With this company he had rendered valiant service in the campaign which ended with the battle of Pea Ridge.

Many of the acts of Fremont, and a number of commissions which he had granted, had been repudiated by the Government, and thus Middleton had found himself free. But he had no intention of remaining inactive, his heart was too much in the cause. If no other field was open, he would enlist as a private soldier. But there was no need of that, he was too well known. Though young, scarcely more than eighteen, he had rendered services and performed deeds which made his name known throughout the State. He had thwarted the machinations of Frost, Price, Governor Jackson, and other disloyal leaders in their efforts to drag Missouri out of the Union.

While Lawrence was undecided just what to do he met Frank P. Blair, who was overjoyed to see him. He had been Blair's private secretary during the troublesome months before the opening of the war, and a lieutenant in one of his regiments of Home Guards.

Blair, who had been appointed a brigadier general in the Federal army, had been at home on business, and was about to return to his command.

"Never better pleased to see anyone in my life," said Blair, nearly shaking Lawrence's arm off. "Oh, I've kept track of you, you've been keeping up your reputation. But what are you doing in St. Louis? I thought you were with Curtis."

Lawrence told Blair of his predicament,—that he was now without a command or a commission.

"Good!" cried Blair, shaking Lawrence's hand again. "I was about to write to Curtis to see if I could not get you away from him. I will see that you are commissioned as captain, and I will detail you on my staff. I need just such fellows as you."

"I couldn't ask anything better," said Lawrence, "and, General, I thank you from the bottom of my heart. It is more than I could have possibly hoped, more than I deserve."

"Too modest, my boy. If you had your deserts, you would be wearing a star on your shoulder, as well as myself. I am a little selfish in asking you to go on my staff. I want you."

So it was all arranged, and Lawrence went to see his uncle and tell him of his new position on Blair's staff. This uncle, Alfred Middleton, was one of the wealthiest citizens of St. Louis, and an ardent secessionist. Now that Lawrence was out of the army, he was in hopes that he would stay out, and he showed his disappointment in his face. He had also been greatly worried of late. His only son was with Price, and it was a sore spot with him that the Missouri Confederate troops had been ordered east, and not been left to defend their native State.

In fact, the Confederates of the State felt that they had been deserted by the Richmond Government, and bore Jeff Davis and his cabinet no great love.

"I am sorry, Lawrence," said his uncle, sadly. "I was in hopes that as long as you were out of the army you would stay out. Why will you persist in fighting against those who were your friends? Your whole interest lies with the South."

"Uncle, please do not let us discuss that question again," replied Lawrence. "You and I are both firm in our belief, and no amount of discussion will change either."

Mr. Middleton sighed, but did not resume the subject. That Lawrence, whom he looked upon almost as a son, should take up arms against the South was to him a source of endless regret.

The next two or three days were busy ones with Lawrence. The new arrangement had one drawback, it would separate him from Dan Sherman, who had been a lieutenant in his company of scouts, and the two were inseparable. Dan would not hear of parting from Lawrence; he would go with him if he had to go as his servant.

"I can never consent to that, Dan," said Lawrence. "I had rather tell Blair I have reconsidered his proposition and cannot accept."

"You'll do no such thing," retorted Sherman. "I will try and behave myself, but I feel that something will happen, and we will not be separated."

Something did happen, much quicker than either one expected. Something which entirely changed the calculations of Lawrence. It was to be some months before he saw service with Blair.

Lawrence and Dan were passing a newspaper office, before which a large crowd had gathered, reading the war bulletins. They told that Halleck was tightening his lines around Corinth and that the place must soon fall; and that McClellan was well on his way towards Richmond.

It was curious to watch the faces of those who read. The countenances of those who were for the Union would brighten when anything was posted favorable to the Union cause, and now and then a cheer would be given.

The iron heel of the Yankees was on St. Louis, and the Confederate sympathizers dare not be so outspoken, but when anything favorable to the South was posted their eyes would flash, and their countenances beam with joy.

And thus the crowd stood and read, once friends and neighbors, but now ready to rend each other to pieces at the first opportunity.

Lawrence mingled with the crowd, and as he read he felt a bulky envelope thrust in his hand and caught a glimpse of a dusky arm. He glanced at the address and then turned to see who had given it to him, but could not. He glanced at the envelope again. Yes, it was for him. In bold letters was written, "For Captain Lawrence Middleton. Important."

The writing was strange to Lawrence, and making his way through the crowd he sought a private place where he could see what had so mysteriously come into his possession. As he read, a look of surprise came over his face, and then his countenance grew stern and grim. Carefully he read the document through from beginning to end. It was signed "By One Who Knows." There was not a mark to tell who was the writer. The writing was strong and bold, and possessed an originality of its own, as if the writer had put much of his own character in it. Lawrence sat and pondered long. He looked the manuscript over and over again to see if he could not discover some private mark, something that would identify the writer, but he found nothing.

"Strange," he muttered, "but if Guilford Craig was alive I would swear he was the writer of this. Who else would write me, and me alone, and give such important information? Who else could obtain the information contained in this letter? Yet Guilford is dead. Benton Shelly was seen to shoot him. There were those who saw him lying on the ground, still in death, his bosom drenched in blood. But his body was not found. Guilford, Guilford, are you still alive? But why do I indulge in such vain hope that he is alive? The proof of his death is too plain. This letter must have been written by another, but who? Who? And why send it to me?"

The letter was, in fact, a full and complete exposÉ of the plans of the Confederates. It told of the conception of the plot; who was carrying it out; of the hundreds who had taken the oath of allegiance in order that they might work more securely, and that many had even enlisted in the State militia, so that when the supreme time came they could desert: the time set for the uprising was the last of July or else the first of August, by which time they hoped to have at least forty thousand men enrolled.

"Blair and Schofield must see this, and no time lost," said Lawrence to himself as he placed the communication carefully in his pocket.

Blair was soon found. After carefully reading the letter he said, "I am not surprised. I warned the Government of the folly of removing so many troops from the State. But who could have written this?"

"If Guilford Craig was alive there would be but one answer," replied Lawrence. "As it is, it is a mystery."

"Let us see Schofield at once," said Blair. "There should be no time lost."

Repairing to the headquarters of General Schofield, they were readily admitted. General Schofield was the chief of staff to General Lyon at the time of the battle of Wilson Creek, and, of course, knew Lawrence well. "Glad to see you, Captain," said the General. "Curtis has written me of your good work. You are not with him now, are you?"

"No, you know the commission I held was granted by Fremont. The authorities at Washington declared it illegal."

"Ah, there was a large number of those commissions. I must see what I can do for you."

"I thank you, General, but General Blair has just done me the great honor of appointing me on his staff."

"General Blair, as well as yourself, is to be congratulated," answered the General.

Blair now spoke. "General, our business with you is very important. Captain Middleton, please show the General the communication you received."

Lawrence handed the General the mysterious message and Schofield read it with a darkened brow.

"Who wrote this?" he asked, abruptly.

"General, I do not know."

"Then it may be a fake, a joke. Someone may be trying to scare us."

"General, it is no joke, the proof is too positive," replied Lawrence, earnestly.

"That is so," answered the General. "It also confirms rumors I have been hearing. There has been unusual activity among Southern sympathizers, all over the State, yet outside of the guerrilla bands there have been no hostile demonstrations. This must have been written by someone deep in their counsels."

"General, do you remember Guilford Craig?"

"Remember him! Indeed, I do. Can I ever forget what he and you were to Lyon?"

"If Guilford Craig had not been killed at the battle of Pea Ridge I would be positive the communication came from him. But the handwriting bears no resemblance to his."

"Are you certain he was killed?"

"The proof seems positive, but his body was not found," answered Lawrence.

Schofield sat for a moment in silence, and then suddenly said to Blair, "General Blair, I have a great favor to ask of you."

"What is it, General? Any favor I can give you will be readily granted."

"That you relinquish your claim on Captain Middleton, at least, until this crisis is over, and let me have him."

Blair looked surprised, but no more so than Lawrence.

"You know," continued Schofield, "there is no one who can help me more just now than Captain Middleton. No one who understands the work before me better. This Guilford Craig, as you are aware, was a curious character. To no one would he report but to Captain Middleton. This exposÉ, coming to Middleton, instead of to me, leads me to believe that Craig was not killed, as supposed, but in some way got off the field, and for reasons, known only to himself, remains in hiding. Judging the future by the past, if he is alive, and has more information to impart, it would be given only through the same source. For these reasons I would like to attach Captain Middleton to my staff."

"General, your reasons are good," replied Blair, "and it shall be for Captain Middleton to decide."

"Where I can do my country the most good, there I am willing to go," answered Lawrence.

So it was decided that for the summer Lawrence should remain with General Schofield. The words of General Schofield had also given Lawrence hope that Guilford lived. But as weeks and months passed, and no other communication came to him, he again looked upon Guilford as dead.

Hopeless of getting relief from the Federal Government, General Schofield entered upon the gigantic task of organizing the militia of the State. In this Lawrence was of the greatest service, and through a system of spies and scouts he was enabled to keep General Schofield well informed as to what was going on in the State.

In helping organize the militia, Lawrence had many adventures and many hair-breadth escapes, and by his side always rode the faithful Dan Sherman, and together they shared every danger.

By the last of July, as has been stated, there were nearly one hundred thousand men arrayed against each other. It was a partisan warfare on a mighty scale, and the storm was about to burst.