It is said that during his abortive campaign to invade Britannia, the infamous Roman emperor Caligula ordered his legions into the surf to attack Poseidon and claim seashells as trophies of war. Cees Nooteboom is considerably more thoughtful in his relationship with the god of the sea. As autumn falls each year, Nooteboom writes Poseidon a letter requesting permission to return to his home in Minorca the following spring. Of course, it would be the...