Notes on verification

Corroborated by German Wikipedia, rare-book dealer bibliographic records citing standard reference works, and Cambridge University Press academic scholarship, all independently confirming date, print run, two-volume format, and publisher. [cascade flags: wikipedia_mirror_dropped_other_sources_exist | tier=silver indep_score=0.867 clusters=3 claim_tier=notable | framework convergence=partial (upstreams: Bürgin bibliography of Thomas Mann's works, Wilpert/Gühring bibliography) — publishers independent, evidence may not be | kind=empirical eligibility=high]