I-block staging entry validated for model fit. Imported from staging batch duell-thimm-i, source entry 1100. Normalized as institutional or periodical material during bibliographic review. Normalized on 2026-08-08 as the canonical 1858 British cavalry sword, carbine, pistol, and lance exercise manual. Duplicate work 690 was merged into work 2271 so that the fuller London Parker imprint witness is preserved on the canonical record.
The London 1860 and 1865 witnesses are retained as later editions of the 1858 Horse Guards manual.