In the Fifteenth Corps there are two major generals who command divisions—namely, Steele and Blair—and one brigadier, Tuttle. Steele has also been sick through the campaign, but has kept constantly at his post. He is a gentlemanly, pleasant fellow.... Sherman has a high opinion of his capacity, and every one says that he handles troops with great coolness and skill in battle. To me his mind seems to work in a desultory way, like the mind of a captain of infantry long habituated to garrison duty at a frontier post. He takes things in bits, like a gossiping companion, and never comprehensively and strongly, like a man of clear brain and a ruling purpose. But on the whole I consider him one of the best division generals in this army, yet you can not rely on him to make a logical statement, or to exercise any independent command.

Of Steele's brigadiers, Colonel Woods eminently deserves promotion. A Hercules in form, in energy, and in pertinacity, he is both safe and sure. Colonel Manter, of Missouri, is a respectable officer. General Thayer is a fair but not first-rate officer.

Frank Blair is about the same as an officer that he is as a politician. He is intelligent, prompt, determined, rather inclining to disorder, a poor disciplinarian, but a brave fighter. I judge that he will soon leave the army, and that he prefers his seat in Congress to his commission.

In Frank Blair's division there are two brigadier generals, Ewing and Lightburne. Ewing seems to possess many of the qualities of his father, whom you know better than I do, I suppose. Lightburne has not served long with this army, and I have had no opportunity of learning his measure. Placed in a command during the siege where General Sherman himself directed what was to be done, he has had little to do. He seems to belong to the heavy rather than the rapid department of the forces.

Colonel Giles Smith is one of the very best brigadiers in Sherman's corps, perhaps the best of all next to Colonel Woods. He only requires the chance to develop into an officer of uncommon power and usefulness. There are plenty of men with generals' commissions who in all military respects are not fit to tie his shoes.

Of General Tuttle, who commands Sherman's third division, I have already spoken, and need not here repeat it. Bravery and zeal constitute his only qualifications for command. His principal brigadier is General Mower, a brilliant officer, but not of large mental calibre. Colonel Wood, who commands another of his brigades, is greatly esteemed by General Grant, but I do not know him; neither do I know the commander of his third brigade.

Three divisions of the Sixteenth Corps have been serving in Grant's army for some time past. They are all commanded by brigadier generals, and the brigades by colonels. The first of these divisions to arrive before Vicksburg was Lauman's. This general got his promotion by bravery on the field and Iowa political influence. He is totally unfit to command—a very good man but a very poor general. His brigade commanders are none of them above mediocrity. The next division of the Sixteenth Corps to join the Vicksburg army was General Kimball's. He is not so bad a commander as Lauman, but he is bad enough; brave, of course, but lacking the military instinct and the genius of generalship. I don't know any of his brigade commanders. The third division of the Sixteenth Corps now near Vicksburg is that of General W. S. Smith. He is one of the best officers in that army. A rigid disciplinarian, his division is always ready and always safe. A man of brains, a hard worker, unpretending, quick, suggestive, he may also be a little crotchety, for such is his reputation; but I judge that he only needs the opportunity to render great services. What his brigade commanders are worth I can't say, but I am sure they have a first-rate schoolmaster in him.

I now come to the Seventeenth Corps and to its most prominent division general, Logan. This is a man of remarkable qualities and peculiar character. Heroic and brilliant, he is sometimes unsteady. Inspiring his men with his own enthusiasm on the field of battle, he is splendid in all its crash and commotion, but before it begins he is doubtful of the result, and after it is over he is fearful we may yet be beaten. A man of instinct and not of reflection, his judgments are often absurd, but his extemporaneous opinions are very apt to be right. Deficient in education, he is full of generous attachments and sincere animosities. On the whole, few can serve the cause of the country more effectively than he, and none serve it more faithfully.

Logan's oldest brigade commander is General John D. Stevenson, of Missouri. He is a person of much talent, but a grumbler. He was one of the oldest colonels in the volunteer service, but because he had always been an antislavery man all the others were promoted before him. This is still one of his grounds for discontent, and in addition younger brigadiers have been put before him since. Thus the world will not go to suit him. He has his own notions, too, of what should be done on the field of battle, and General McPherson has twice during this campaign had to rebuke him very severely for his failure to come to time on critical occasions.

Logan's second brigade is commanded by General Leggett, of Ohio. This officer has distinguished himself during the siege, and will be likely to distinguish himself hereafter. He possesses a clear head, an equable temper, and great propulsive power over his men. He is also a hard worker, and whatever he touches goes easily. The third brigade of this division has for a short time been commanded by Colonel Force. I only know that Logan, McPherson, and Grant all think well of him.