... Sedalia, Mo., August 24, 1862. Colonel Catherwood: sir: On tile morning of the fifteenth instant, about eight hundred men (our detachment included) were sent out from Lexington, under command of Major Foster . We arrived in the vicinity of Lone Jack at ten P. M. on the evening of the same day, where we learned that the enemy, two thousand five hundred strong, were encamped one and one half miles north o...