...hich it had to be supported on the right, at about ten o'clock A. M., by several thousands of General Grant's troops, under McClernand and Hurlbut, it was held at bay until two brigades, Gibson's and Kirk 's, of McCook's division, joined in the struggle. His other brigade, Rousseau's, containing three battalions of Regulars, had reached the field early in the morning and taken a position near General...