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. Next in rank among McPherson's division generals is McArthur. He has been in the reserve throughout the campaign, and has had little opportunity of proving his mettle. He is a shrewd, steady Scotchman, trustworthy rather than brilliant, good at hard knocks, but not a great commander. Two of his brigadiers, however, have gained very honorable distinction in this campaign, namely Crocker, who commanded Quinby's division at Port Gibson, Raymond, Jackson, and Champion's Hill, and Ransom. Crocker was sick throughout, and, as soon as Quinby returned to his command, had to go away, and it is feared may never be able to come back. He is an officer of great promise and remarkable power. Ransom has commanded on McPherson's right during the siege, and has exceeded every other brigadier in the zeal, intelligence, and efficiency with which his siege works were constructed and pushed forward. At the time of the surrender his trenches were so well completed that the engineers agreed that they offered the best opportunity in the whole of our lines for the advance of storming columns. Captain Comstock told me that ten thousand men could there be marched under cover up to the very lines of the enemy. In the assault of May 22d, Ransom was equally conspicuous for the bravery with which he exposed himself. No young man in all this army has more future than he. The third brigade of McArthur's division, that of General Reid, has been detached during the campaign at Lake Providence and elsewhere, and I have not been able to make General R.'s acquaintance.