From what was to me a gift of friendship day: a book makes some of Rosa Luxemburg's prison letters written by her friends Sonia Liebknecht and Mathilde Wurm between July 1916 and October 1918. And all the jingles who composed this period: songs of birds, plants, colors and sounds passages. Those for events in the events of the being-locked. As for the outside: October, World War Revolution, The emigrant and Chaplin The Adventurer, The affliction flowers and Klee's zoological garden. Appearances / disappearances, present stories, their intertwined. Destinies.