Ever traveled to Europe by ship? Roland Merullo nails a certain ennui and the cloud of memories such conveyances can bring in today's Boston Globe op-ed, "Voyage of Emptiness." He and his family took the Queen Mary II back from their Italian adventure, where he was working on a new book. He couples his ancestors' (and not that long ago) coming to America under much less luxurious accommodations with that haunting look on the faces of people who've paid much to enjoy themselves but appear as if they never will.