As a young professor of history and geography, she collaborated with the historian Max Nettlau, notably producing the work La Première Internationale en Espagne (1868–1888) (The First International in Spain).

[1] Thanks to several visits to Catalonia with her sister, Madeleine Lamberet, she was familiar with the anarchist movement in Spain.

It was in this context that she met Bernardo Pozo Riera, head of the Press and Propaganda Office of the Spanish Confederación Nacional del Trabajo and the Federación Anarquista Ibérica.

[2] During the Spanish Revolution of 1936, she fostered intense activity under the auspices of the Solidaridad Internacional Antifascista (SIA), helping to develop the "Spartaco" children's colony to host refugee children from Basque Country, Asturias and the front in Madrid.

[3] After the close of World War II, she helped in re-establishing the Anarchist Federation in France, alongside Robert Joulin, Henri Bouyé, Maurice Joyeux, Georges Fontenis, Suzy Chevet, Georges Vincey, Aristide and Paul Lapeyre, Maurice Laisant, Giliane Berneri, Solange Dumont, Roger Caron, Maurice Fayolle, Henri Oriol and Paul Chery.