20. Loomis, who has just returned from home, called this evening, and we drank a bottle of wine over the promotion. He is in trouble about his commission as colonel of artillery. Two months ago the Governor of Michigan gave him the commission, and since that time he has been wearing a colonel's uniform; but General Rosecrans has expressed doubts about his right to assume the rank. Loomis is all right, doubtless, and to-morrow, when the matter is talked over between the General and himself, it will be settled satisfactorily.

21. I have been running over Russell's diary, "North and South," and must say the Yankee Nation, when looked at through Mr. Russell's spectacles, does not appear enveloped in that star-spangled glory and super-celestial blue with which it is wont to loom up before patriotic eyes on Fourth of July occasions. He has treated us, however, fully as well as we have treated him. We became angry because he told unpleasant truths about us, and he became enraged because we abused him for it. He thanks God that he is not an American; and should not we, in a spirit of conciliation, meet him half way, and feel thankful that he is not?

Flaming dispatches will appear in the Northern papers to-morrow respecting the defeat of John Morgan, by a small brigade of our troops under Colonel Hall. The report will say that forty of the enemy were killed, one hundred and fifty wounded, and one hundred and twenty captured; loss on our side inconsiderable. The reporters have probably contributed largely to the brilliancy of this affair. It is always safe to accept with distrust all reports which affirm that a few men, with little loss, routed, slaughtered, or captured a large force.

Peach and cherry trees are in full bloom. The grass is beginning to creep out. Summer birds occasionally sing around us. In a few weeks more the trees will be in full leaf again.

23. General Negley, who went home some time ago, returned to-day, and, I see, wears two stars.

General Brannan arrived a day or two ago. He was on the train captured by guerrillas, but was rescued a few minutes after.

The boys have a rumor that Bragg is near, and has sent General Rosecrans a very polite note requesting him to surrender Murfreesboro at once. If the latter refuses to accept this most gentlemanly invitation to deliver up all his forces, Bragg proposes to commence an assault upon our works at twelve m., and show us no mercy. This, of course, is reliable.

At sunset rain began to fall, and has continued to pour down steadily ever since. The night is gloomy. Adjutant Wilson, in the next tent, is endeavoring to lift himself from the slough of despond by humming a ditty of true love; but the effort is evidently a failure.

This morning I stood on the bank of the river and observed the pontoniers as they threw their bridge of boats across the stream. Twice each week they unload the pontoons from the wagons, run them into the water, put the scantling from boat to boat, lay down the plank, and thus make a good bridge on which men, horses, and wagons can cross. After completing the bridge, they immediately begin to take it up, load the lumber and pontoons on the wagons, and return to camp. They can bridge any stream between this and the Tennessee in an hour, and can put a bridge over that in probably three hours.

General Rosecrans makes a fine display in his visits about the camps. He is accompanied by his staff and a large and well-equipped escort, with outriders in front and rear. The National flag is borne at the head of the column.