That’s how I remember our friendship. We passed our stories back and forth until they merged. And with each pass, we lightened our own burden. At that time, brief though it was, we shared a single imagination. We may even have exaggerated our enthusiasm for the stories we told, for the sake of going on another walk and extending our frail acquaintance a bit further. But in the best moments our friendship was weightless—a pure, untainted invention.