Mounted service. : Active young men wanted for Col. Rush's regiment Philadelphia Light Cavalry. The lieut. col. is Capt. J.H. McArthur, Fifth Regiment United States Cavalry. The regimental quarter master is Lieut. T.E. Maley, who has served for ten years in the United States Cavalry. Six full companies have been mustered into service. Head quarters, 833 Market St. Roll open at Camp Meigs, on 2d St. Road ab. Nicetown Lane.