From that point onwards it was mad, black toil for many hours. There was a full moon (they’d planned it that way long in advance, so that they’d have better light during the tricky parts of the journey) and it shone very bright in the cold sky. As they traversed the harbor entrance, all of the ship’s officers gathered in Enoch’s cabin to watch the one quicksilver flask that had not been changed; it seemed to come alive at a certain point, when the rhythmic waves struck the hull, and thrashed around as if some djinn were trapped inside trying to fight its way out.