The Facts of Winter is a series of dreams, all dreamed by people in and around Paris during the winter of 1881. It is historical fiction once removed: an account of events that were imaginary even from the point of view of an invented past - although Poissel claimed (in a letter to his friend Bartholomeo Facil, August, 1905) that the characters in this book are all true - all persons who really lived and slept that winter.