E-block staging entry validated for model fit. Imported from staging batch duell-thimm-e, source entry 597.
Gelli gives the same Donon fencing treatise with a circa-1830 dating and the 'Lithog. de Holbig' imprint context. This witness confirms the established local normalization of the Donon work family.
Vigeant 1882 expands the Donon ca. 1830 notice with the Helbig lithograph context, thirteen outline plates, regimental advice, and the report that the work might be attributable to Moliere's fencing master.