The paper is perilously thin, threatening to tear at the touch – this is what airmail letters used to look like. The letters are typewritten – this is how letters used to be written. The remnants of the torn, crinkly envelopes tell part of the story: “To Mr. Dr. Heinz Loewy. Frossoula Transport. Quarantaine Station Beyrouth. Republique Libannaise.” A father writes...