From verso of card: "The picture shows the four members of a first aid party running with a stretcher to a place where casualties have occurred. As gas has been used, they are wearing a light suit of protective clothing, with gum boots and Service Respirators. . . . The scheme of Air Raid Precautions provides for the establishment of first aid posts in large numbers, so that they will be within easy access of any casualty. Such posts will be equipped to deal with minor injuries and casualties due to non-persistent gases. There will also be facilities for the cleaning and treatment of persons contaminated with blister gas."