H-block staging entry validated for model fit. Imported from staging batch duell-thimm-h, source entry 979.
Gelli cites Johann Georg Heinrich Haspelmacher for the 1783 Helmstadt fencing treatise; the local record already represented the same work without the author statement.
Enrichment phase 586: duplicate Vigeant shell consolidated; the 84-page digitized Helmstedt 1783 manifestation is retained.
Enrichment phase 586: authority, responsibility and manifestation fields checked individually.