Verify the Barbier 'night writing' myth-correction against a primary source, and confirm the Henri-1952 → Roblin transmission chain that allegedly spread the soldier-code legend

Three claim-notes promoted 2026-07-09 — claim-barbier-night-writing-designed-for-blind-not-soldiers, claim-braille-barbier-first-met-1833-after-braille-published, and claim-barbier-universal-phonetic-literacy-ambition — all rest on a single directly-read source: Philippa Campsie's parisianfields.com essay (Tier 2, an expert's popular account of her own archival research). The peer-reviewed version ("Charles Barbier: A hidden story," Disability Studies Quarterly, 2021) and the Perkins School account both returned HTTP 403 during the capture session, so the archival basis was never read at the primary level, and the notes are held at seedling / capture-verified.

Two distinct verifications are needed.

Why it matters. The whole thread is a myth-correction; a myth-correction resting on one un-re-read blog post is only as strong as that post. And the correction's most vivid mechanistic detail — how the false story spread — is currently unverified, which is exactly the load-bearing part of a citogenesis argument.

What would answer it:

1. Primary-level read of the correction. Reach the DSQ 2021 article via an alternate route (Wayback Machine, institutional access, or a stable mirror) and confirm, against Campsie's own citations, (a) that Barbier's 1815 Essai sur divers procédés d'expéditive française frames the system for blind people, (b) the ~two-days-of-1792 military service detail, and (c) the 1829 publication / 1833 first-meeting chronology. This would lift the three notes off capture-verified.
2. The transmission chain. The capture's flagged [unverified-historical] lead alleges that Pierre Henri's 1952 centenary biography La Vie et l'Oeuvre de Louis Braille speculated about a military origin with a hedge ("here is roughly how things must have happened"), and that local historian Jean Roblin then popularized it without the hedge, cementing the legend for ~60 years. Read Henri and Roblin (or the DSQ / Perkins accounts that summarize them) directly to confirm the hedge existed and was dropped — this is the "shared hedges dropped" mechanism the vault's citogenesis cluster (claim-wikipedia-amari-sgd-citogenesis, myth-linnainmaa-uncited-before-2010s) would want established rather than asserted.

Candidate next moves. Try the Wayback Machine snapshot of dsq-sds.org/article/view/7499 and perkins.org/braille-barbier first; failing that, look for the DSQ article via an institutional proxy or a citation index. A separate, still-unexplored hook from the same capture — Alexandre-René Pignier's alleged fabrication of a Braille–Barbier personal rivalry — could be chased in the same primary sources while they are open.

Progress, 2026-07-24 (partial — left open). A follow-up capture (10-inbox/raw/2026-07-23-verify-the-barbier-night-writing-myth-correction-against.md) resolved part of item 1 and fully chased the Pignier hook, but left item 2 open:

• Resolved at Tier 1: the 1829/1833 chronology, via a 2024 recorded UKAAF interview transcript with Campsie (direct quotes) plus the DSQ 2021 abstract (via a colab.ws mirror — the canonical dsq-sds.org host is still walled off). See the updated claim-braille-barbier-first-met-1833-after-braille-published.
• Resolved at Tier 1, and sharpened well past "unexplored hook": the Pignier fabrication now has a source (his post-1840s retirement memoir, written after both Braille and Barbier were dead) and a named scene (a fictional hostile 1821 exchange). See the new note claim-pignier-fabricated-braille-barbier-hostile-encounter-in-retirement-memoir.
• Still NOT resolved — the sole remaining reason to keep this question open: the specific Henri-1952-hedge → Roblin-unhedged-popularization mechanism (item 2). The interview confirms Henri exists, wrote in 1952 (Braille's centenary/Panthéon-transfer year), and is one of two accounts (with Pignier's) the DSQ article corrects — but does not describe a hedge or Roblin's role in dropping it. dsq-sds.org and perkins.org/braille-barbier were both still behind bot-check walls this session (Anubis and HTTP 403 respectively), as were Wayback Machine and archive.ph mirrors of both. Whoever picks this up next should retry those two URLs first, or find an institutional-access route to the full DSQ article.
• Item 1(a)/(b) (the 1815 book's blind-people framing verbatim, and the ~two-days-of-1792 military-service detail) remain confirmed only via the original parisianfields.com post and its 2026-07-22 cross-model re-fetch — still not cross-checked against the peer-reviewed DSQ text or an interview quote naming those specifics directly.

Left status: open, genuinely partial rather than forced closed.