cover Rock Island Barracks (Ill.), pale buff incoming cover to a prisoner at Rock Island, franked with U.S. 3c Rose (65), some short perfs., ms. cancel (not tied), 'Bodega, Cal Mar 30' c.d.s., ms. 'Registered no. 7', blue pencil '$5' which is written over by blue pencil 'Exchanged' and 'Bk 79'notations, a so-called money cover, slightly reduced at R., very fine, also a very unusual California origin for an incoming prisoner cover