Light cavalry! : Col. Rich'd H. Rush's regiment! Active young men wanted for Company K.--the last company. The regiment is in camp near Philadelphia where it is being fully equipped with horses, arms & clothing. The colonel is a graduate of West Point, and served through the Mexican War. He is a classmate of General M'Clellan. The lieutenant colonel is from the regular army, and the quartermaster has had ten years experience in the regular cavalry. Eight hundred men are already mustered in. The pay is as follows:--1st sergeat [sic], $22; other sergeants, $19; corporals, $17; privates, $14; blacksmiths, $17; buglers, $16. Recruiting station at [blank] where the officers can be seen. / Captain Howard Ellis, Lieutenant Neil.