Joseph Conrad (2015). “Under Western Eyes (Unabridged Deluxe Edition): An Intriguing Tale of Espionage and Betrayal in Czarist Russia From the Renowned Author of Heart of Darkness, Nostromo & The Secret Agent (Including Author’s Memoirs, Letters & Critical Essays)”, p.475, e-artnow
Joseph Conrad (2015). “The Complete Works of Joseph Conrad: 20 Novels & 26 Short Stories (Including Memoirs, Essays & Letters in One Single Edition): Classics of World Literature from One of the Greatest English Novelists: Heart of Darkness, The Duel, Lord Jim, The Secret Agent, Nostromo, The Shadow-Line & Under Western Eyes”, p.5729, e-artnow