«Сказ о тульском косом Левше и о стальной блохе» (English: "The Tale of Cross-eyed Lefty from Tula and the Steel Flea", or "The Tale of the Crosseyed Lefthander from Tula and the Steel Flea" or simply "Levsha", or "The Lefthander", or "Lefty", or "The Steel Flea", or "The Left-handed Craftsman") is a 1881 short story by Nikolai Leskov. Styled as a folk tale, it tells a story of a left-handed arms craftsman from Tula (traditionally a center of the Russian armaments industry) who outperformed his English colleagues by providing a clockwork steel flea they'd made with horseshoes and inscriptions on them.
