Missing! To the sisters of the Red Cross who have perished in hospital ships sunk by German submarinesBuy wall art of this image titled: Missing! To the sisters of the Red Cross who have perished in hospital ships sunk by German submarines, from the World War I Posters Collection by Second Story Prints. Top quality print reproductions available now! Tags British Red Cross Society. World War, 1914 1918 Women Great Britain. Hospital ships British 1910 1920. Notes Title from item. When at the last the deeps reveal The treasure they have stored, When the