Books by J. Bernard Mannix:
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Mannix, J. Bernard (John Bernard): Heroes of the Darkness (London: S. W. Partridge and Co., ca. 1911) (multiple formats at archive.org)
Additional books by J. Bernard Mannix in the extended shelves:
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Mannix, J. Bernard (John Bernard): Heroes of the darkness (S. W. Partridge & co., ltd., 1911) (page images at HathiTrust; US access only)- Mannix, J. Bernard (John Bernard): Mines and their story (J. B. Lippincott;, 1913) (page images at HathiTrust; US access only)
- Mannix, J. Bernard (John Bernard): Mines and their story (Sidgwick & Jackson ltd., 1913) (page images at HathiTrust)
Find more by J. Bernard Mannix at your library, or elsewhere.