cover 1915-18 "Prisoner of War." XU5 and letter sheets (4), XU5 and cards (2, one stationery) to Egypt (2), Germany (5) and Switzerland (redirected to Germany), showing various markings including oval "FREE FROM PRISONER OF WAR/PC/MALTA" (POW-6) in black, blue and violet (2), and oval "FREE FROM PRISONER OF WAR/PC/MALTA" (POW-71/74) showing numbers "1" and "3" in violet, and "2" and "4" in red. (8)