Field Report Archive

Evidence Locker

3 inspectable evidence items. Claims and source findings are kept separate.

Documented Timeline

• July 10, 1840: Hoyois later records that 132 catalogue copies were supplied, including copies on vellum and colored paper.
• July 30, 1840: Chalon writes to Frederic Hennebert that he is involved in the catalogue and that the joke has exceeded expectations.
• August 5, 1840: A notice is printed announcing that the auction will not occur because Binche has supposedly bought the collection.
• August 10, 1840: The fictitious auction had been scheduled for eleven in the morning in Binche.
• 1857: Emmanuel Hoyois publishes Documents et particularites historiques sur le Catalogue du comte de Fortsas, collecting correspondence and the aftermath.
• 1912: The Societe des bibliophiles belges seant a Mons publishes a complete commemorative volume reproducing Chalon's 1840 admission letters.

Named Participants and Roles

• Renier Chalon, Architect of the hoax and author of admission letters. Account basis: Contemporaneous. Witness quality: High. The 1912 society volume identifies manuscript number 1281 at Ghent University Library and prints letters dated during the hoax in which Chalon admits the fiction. The staged item is a later transcription, not the manuscript itself. Evidence: bibliophiles_belges_1912
• Emmanuel Hoyois, Printer of the catalogue and author of the 1857 historical dossier. Account basis: Retrospective. Witness quality: High. Hoyois had direct involvement and preserved extensive correspondence, but his published dossier also records a dispute with Chalon and uses a combative tone. Evidence: hoyois_dossier_1857
• Societe des bibliophiles belges seant a Mons, Institutional retrospective publisher. Account basis: Documentary-Only. Witness quality: High. The society's complete 1912 volume supplies an independent historical frame, identifies manuscript provenance, and reproduces Chalon's admission letters. Evidence: bibliophiles_belges_1912

Contradictions and Record Conflicts

• The catalogue presents the count, library, and sale as real, while Chalon's letter states that the count, notary, and all books for sale were a joke.
• The cancellation notice claimed that Binche had acquired the collection, but the documentary record identifies that explanation as the device used to end the hoax.
• The staged 1840 artifact is a complete period catalogue but institutional metadata identifies it as an unauthorized near-facsimile second issue, not the first issue.

Conventional Explanations

• The Fortsas sale was a deliberately engineered bibliographical hoax by Renier Chalon.
  Evidence for: Chalon's reproduced 1840 letter explicitly calls the count, notary, and books a joke. Hoyois's 1857 dossier describes the episode as an innocent mystification and documents the collectors' correspondence.
  Limits: The original manuscript letters are not staged here, and Hoyois's participant account must be read in light of his later dispute with Chalon.
  Evidence: hoyois_dossier_1857, bibliophiles_belges_1912
• The catalogue's realism and tailored fictitious entries exploited collectors' expectations about unique books and provenance.
  Evidence for: The complete catalogue supplies detailed invented titles and a biography of the count, while Chalon's reproduced letters explain that entries were aimed at particular collectors.
  Limits: The surviving records do not establish every recipient's subjective reasons for believing the catalogue.
  Evidence: fortsas_catalogue_1840, bibliophiles_belges_1912

Evidence Stance Matrix

Missing Evidence

• The original handwritten Chalon letters cited as Ghent University Library manuscript number 1281
  The manuscripts would allow handwriting, ink, paper, docket, and transcription checks against the 1912 printed text.
• A complete first-issue July 1840 catalogue copy with source-specific unrestricted scan rights
  The staged 1840 period copy is identified by its holding institution as the unauthorized near-facsimile second issue.
• Complete postal and travel records for all intended auction attendees
  They would establish the full reach and practical consequences of the hoax rather than relying on selected correspondence.

What Remains Unresolved

• The precise division of planning, printing, and publicity work between Chalon and Hoyois in July 1840
  Hoyois was the printer and a participant source, but his later conflict with Chalon complicates attribution beyond Chalon's admitted authorship.
• The exact number of collectors who arrived in Binche or began travel
  The complete staged sources contain named plans and correspondence but do not provide an independently verified attendance census.

Investigative Hypotheses

Open Questions

Archival Landing Pages and Evidence Corpus