My solo travels in Paris have brought many perfect hours of being alone but not a moment of loneliness. People who depend on other people are often in hiding from themselves. Two and a quarter million people live in the City of Light: you will see many of them and you will pass them in the street, but when you see Notre Dame after dark and walk home and perhaps stop to have a drink in the Marais, you can feel that the only thing that is missing from your experience is the common dependence on someone to distract your attention.  You are living without it: you are on vacation.