Шпион Дюше. Письма к А.И. Чернышеву. О доставке необходимых сведений. Условные разговоры о ценностях. Упоминание о Гаспаре д'Ивердон. Вложены другие письма без подписей и без дат Duchet, a spy. Letters to [the Russian Military Attaché in France,] A[leksandr] I[vanovich] Chernyshev concerning the delivery of the necessary information; coded conversations about valuables; and a mention of Gaspard d'Yverdon. Other letters without signatures or dates are enclosed source Text https://ditav.gbv.de/receive/lod_mods_00000641 https://ditav.gbv.de/receive/lod_mods_00000641 OR RGB Diplomatisches Dokument Bericht Brief espionage on the military affairs -- intelligence activities Yverdon, Gaspard d' 11 fra Languages of Diplomacy Digital Edition -- 10.58137/004-2025-1 -- 004-2025 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/restrictedAccess