My husband, Peter, and I are returning from Spain by boat. The whole idea started when Peter read a book about the sinking of the Lusitania. “That sounds like fun!” Peter told me, as he read. “Death at sea?” I asked. “No, the part before that!” Peter clarified. Peter thought the idea of a cross-Atlantic ship sounded fun and romantic. He began investigating transatlantic trips, and once Peter starts investigating a thing, it’s as good as done. Peter discovered that a number of cruise lines reposition their boats from the Mediterranean to the Caribbean in the fall and back again in the spring. Some ...