Run · Voynich Manuscript

T41 generation 6: Herbal B under NPE's Herbal B setting (no homophones, no nomenclator); control fails, manuscript not decoded

Lattice EM decipherment: sign boundaries and key learned together, with a structure-preserving null: Held-out dictionary coverage (bar 0.7 x true plaintext's) / key accuracy by use.

Fails the control gate, so Herbal B was not decoded. With 12 training pages (1,302 words) the key is not recovered even for the simplest system the NPE fit allows; Herbal B is too short for this attack.control 0.341 (bar 0.469), key 0.000, character similarity 0.099; pseudo-Latin nulls 0.283 and 0.3040

Result

Run	Measured	Result	Against	Decision	Date
Run	Held-out dictionary coverage (bar 0.7 x true plaintext's) / key accuracy by use	control 0.341 (bar 0.469), key 0.000, character similarity 0.099; pseudo-Latin nulls 0.283 and 0.304	Herbal A one-sign-per-letter control, 300-400 restarts: key 0.62-0.70	Fails the control gate, so Herbal B was not decoded. With 12 training pages (1,302 words) the key is not recovered even for the simplest system the NPE fit allows; Herbal B is too short for this attack.

What it used and found

Lattice EM decipherment: sign boundaries and key learned together, with a structure-preserving null

Method

MTH

Herbal A and Herbal B paragraph text: training and held-out pages

Dataset

DAT

Latin genre texts

Dataset

DAT

Naibbe cipher tables and example plaintexts (greshko/naibbe-cipher, commit 719f2f4c)

Dataset

DAT

ZL3b transcription

Dataset

DAT

Latin as a re-spaced homophonic stream (period practices)

Answer it tests

ANS

Parameters

pw = 0.25, alpha = 0.05, section = Herbal B, restarts = 300, settings = {'K': 0, 'h_c': 1, 'h_v': 1, 'lam': 0.5, 'Ssyl': 0, 'abbrev': 0, 'p_copy': 0.05, 'p_stay': 0, 'window': 5, 'novowel': 0, 'p_break': 0.9, 'spacing': 'stream', 'simplify': 1, 'positional': 0}, permutations = 100, em_iterations = 60, settings_source = NPE round-2 posterior mode for Herbal B (RUN0DCG56DG7RVQ)

Cite it

Mysteries Department. (2026). T41 generation 6: Herbal B under NPE's Herbal B setting (no homophones, no nomenclator); control fails, manuscript not decoded [Run RUN0DCHDE1J9RM9]. https://mysteriesdept.com/r/RUN0DCHDE1J9RM9

@misc{mysteriesdept_run0dchde1j9rm9,
  title     = {T41 generation 6: Herbal B under NPE's Herbal B setting (no homophones, no nomenclator); control fails, manuscript not decoded},
  author    = {{Mysteries Department}},
  year      = {2026},
  note      = {Run, catalog key RUN0DCHDE1J9RM9},
  url       = {https://mysteriesdept.com/r/RUN0DCHDE1J9RM9}
}