Your travel life has the essence of a dream. It is something outside the normal, yet you are in it. It is peopled with characters you have never seen before and in all probability will never see again. It brings occasional homesickness, and loneliness, and pangs of longing…. But you are like the Vikings or the master mariners of the Elizabethan age, who have gone into a world of adventure, and home is not home until you return. —Agatha Christie