cover 1895 (29 Mar.) long registered envelope (262x104mm) to London bearing 1892 (23 May) 1c. on 3c. brown on yellow blocks (7x2) and (4x2) cancelled by c.d.s., in combination with Straits 5c. blue and 8c. orange tied by "SINGAPORE AP 1" c.d.s. with arrival d.s. adjacent and showing, on reverse, boxed "SARAWAK POST OFFICE/REGISTERED" d.s. in violet. A rare and spectacular franking