R-block staging entry validated for model fit. Imported from staging batch duell-thimm-r, source entry 1836.
Gelli cites Jena witnesses of 1819 and 1839 for Roux's Hiebfechten manual, the later one explicitly with an introduction by Prof. Dr. K. H. Scheidler. The title identity is secure, while the year sequence should be understood as an edition family.
Quality phase 570: false 1819 family date corrected to the documented 1840 first edition and authorship aligned to F. A. W. L. Roux.