*300 copies limited edition* In 2021, at the invitation of Chant du Moineau, Le Un experimented in collective spontaneous creating on a section of the Dordogne River. In an aquatic and poetic logic of space, Le Un continued its research along the Gironde estuary. Three working sessions with three different teams, ultimately bringing together the entire orchestra and our guests: Claire Steimer, historian, Olivier Chadoin, sociologist, Eric Chauvier, anthropologist, Guillaume Bonnel, photographer and also Antoine Boutet, film-maker present throughout this second part. Claire, Eric, Guillaume and Antoine are the observers of this experiment. By analogy, they intersect and corroborate our methods with their respective practices.