Colour PPC 'Ancon Hospital, Panama Canal' with manuscript 'Private Charles. A. Walker, 33rd Infantry, Camp Gaillard, Canal Zone, Panama' on message side franked with 1909 1c black & green 'Booklet' stamp with 'CANAL ZONE' overprint Type 2, imperf at right (SG 40) tied by CULEBRA cds dated NOV 5 1918 with fine strike of large boxed 'P.C.D. MILITARY CENSORSHIP PASSED BY 1st Lieut. 33d Infantry' censor mark in violet with officer's signature inserted in manuscript. Addressed to USA. Fine & scarce.