Trouble at Camp Defiance, Cairo.

A correspondent of the Chicago Times, writing from Cairo on the 18th, says that on last Monday evening, some two or three hundred men composing Col. Cook's regiment, broke lines, and in rather a disorderly manner visited the commissary department, situated some three hundred yards from their camp. The reason assigned was that they were insufficiently fed, and the scanty amount of food furnished was of a very indifferent kind. — They say the bread provided them was of such a character that they could not eat it, while in the way of meat they were even worse off. They were supplied with strong fat bacon, except once each week, when they received beef. The men are represented as quiet and orderly, and unless they had been badly treated it is not believed they would have made the demonstration. Col. Cooke appeared in their midst immediately after their return, and promised his influence to bring about a reform in the matters of which they complained.