{
  "country_code": "LK",
  "id": "mahasona-bear-headed-demon",
  "title": "Mahasona: the cemetery demon with a replacement head",
  "category": "cryptide",
  "date": "1829-01-01",
  "date_label": "1829 publication anchor for the selected historical retelling; no verified creature encounter date",
  "location": "Sinhala folklore in Sri Lanka; southwest regional orientation",
  "lat": 6.3,
  "lng": 80.1,
  "summary": "A giant loses his head in a duel and receives a bear's head in its place. Historical retellings and ritual objects invite investigation of how a frightening figure becomes part of a wider spirit world.",
  "documented_claim": "Upham's historical publication includes the bear-head replacement story and cemetery association.",
  "unproven_claim": "The story establishes a living hybrid creature or proves supernatural causation of illness.",
  "sources": [
    {
      "title": "Edward Upham — The History and Doctrine of Buddhism, 1829",
      "url": "https://upload.wikimedia.org/wikipedia/commons/d/db/The_History_and_Doctirne_of_Buddhism%2C_popularly_illustrated_with_notices_of_the_Kappooism_or_Demon_Worship_and_of_the_Bali_or_Planetary_Incantations_of_Ceylon_%28IA_dli.granth.100292%29.pdf",
      "language": "en",
      "kind": "Historical outsider's illustrated retelling · public-domain scan",
      "note": "Primary evidence for this published version; colonial terminology and mediation require scrutiny.",
      "id": "S1",
      "accessed_on": "2026-09-30"
    },
    {
      "title": "Smithsonian — Gara Yaka devil-dance mask",
      "url": "https://www.si.edu/object/nmnhanthropology_8457153",
      "language": "en",
      "kind": "Primary museum collection record",
      "note": "A different, benevolent figure; contextual comparison only, not a Mahasona object or encounter.",
      "id": "S2",
      "accessed_on": "2026-09-30"
    }
  ],
  "country": "Sri Lanka",
  "author": "Eklipsis",
  "content_languages": [
    "en"
  ],
  "path": "/investigations/mahasona-bear-headed-demon",
  "source_url": "https://upload.wikimedia.org/wikipedia/commons/d/db/The_History_and_Doctirne_of_Buddhism%2C_popularly_illustrated_with_notices_of_the_Kappooism_or_Demon_Worship_and_of_the_Bali_or_Planetary_Incantations_of_Ceylon_%28IA_dli.granth.100292%29.pdf",
  "location_precision": "region",
  "location_note": "Approximate orientation marker for the named locality, not an exact encounter, burial, ritual or excavation position.",
  "location_source_url": "https://www.openstreetmap.org/?mlat=6.3&mlon=80.1#map=8/6.3/80.1",
  "reviewed_on": "2026-09-30",
  "edition": 1,
  "truth_type": "unknown",
  "verdict": "A historical Mahasona narrative is documented. Literal transformation and supernatural illness causation remain unverified; local versions and terminology deserve fuller investigation.",
  "sections": [
    {
      "title": "The mystery and the documented account",
      "text": "Edward Upham's 1829 book recounts a figure called Mahasona losing his head in a fight, receiving a bear's head and becoming associated with burial grounds and illness. It describes offerings and representations within the account's demonology. This is a historical outsider's retelling, not a zoological observation. A much later Smithsonian record of a Gara Yaka mask provides a useful contrast: it calls that different figure benevolent. The two records should not be collapsed into one demon, but they challenge a simplistic assumption that every yakku figure has the same role.",
      "refs": [
        "S1",
        "S2"
      ]
    },
    {
      "title": "The question worth investigating",
      "text": "Which parts of the head-replacement account belong to identifiable Sinhala versions, and which reflect the historical author's framing? Names, functions and translation choices need to be traced before constructing a single biography.",
      "refs": []
    },
    {
      "title": "Evidence, provenance and uncertainty",
      "text": "Upham's terminology and interpretation belong to a colonial-era publication and require comparison with local-language sources. The Smithsonian mask is Gara Yaka, not Mahasona, and supplies context rather than confirmation of the same story. Neither source demonstrates a creature causing disease or establishes ritual medical efficacy.",
      "refs": [
        "S1",
        "S2"
      ]
    },
    {
      "title": "Inspector’s assessment",
      "text": "A historical Mahasona narrative is documented. Literal transformation and supernatural illness causation remain unverified; local versions and terminology deserve fuller investigation.",
      "refs": []
    },
    {
      "title": "Next research and discriminating evidence",
      "text": "Locate the original Sinhala stories or images behind Upham's plates and compare attributed modern oral versions. Record spelling, teller, region and translation of spirit terms. Keep Mahasona, Gara Yaka and other figures distinct. Compare documented performance roles without diagnosing illness from folklore or treating masks as physical creature evidence.",
      "refs": []
    }
  ],
  "timeline": [
    {
      "date": "1829",
      "text": "Upham publishes the selected historical account.",
      "refs": [
        "S1"
      ]
    },
    {
      "date": "1981–1982, contextual object",
      "text": "The Smithsonian dates collection of its different Gara Yaka mask to this interval.",
      "refs": [
        "S2"
      ]
    },
    {
      "date": "10 August 1989, contextual object",
      "text": "The Gara Yaka mask is accessioned; this does not date the Mahasona tale.",
      "refs": [
        "S2"
      ]
    },
    {
      "date": "30 September 2026",
      "text": "Eklipsis compiles this English documentary investigation from the named sources. No field visit or new eyewitness interview is claimed.",
      "refs": []
    }
  ],
  "claims": [
    {
      "text": "Upham's historical publication includes the bear-head replacement story and cemetery association.",
      "status": "Documented in the named record",
      "refs": [
        "S1"
      ]
    },
    {
      "text": "The story establishes a living hybrid creature or proves supernatural causation of illness.",
      "status": "Not established by the selected evidence",
      "refs": [
        "S1",
        "S2"
      ]
    },
    {
      "text": "A historical Mahasona narrative is documented. Literal transformation and supernatural illness causation remain unverified; local versions and terminology deserve fuller investigation.",
      "status": "Editorial assessment; stated limits apply",
      "refs": []
    }
  ],
  "hypotheses": [
    {
      "title": "A mythic transformation within differentiated spirit traditions",
      "status": "Supported documentary framework",
      "support": "The narrative and contrasting mask record show different assigned roles.",
      "limits": "The dossier has not traced all local-language versions.",
      "test": "Compare named figures and complete attributed versions rather than merging 'demon' labels."
    },
    {
      "title": "A literal hybrid causing illness",
      "status": "Not established",
      "support": "The historical story attributes powers to the figure.",
      "limits": "Retelling and representation are not biological or causal evidence.",
      "test": "Separate recorded belief from an independently documented physical encounter."
    }
  ],
  "tasks": [
    {
      "title": "Trace the earliest accessible record",
      "body": "For Mahasona: the cemetery demon with a replacement head, record author or storyteller, collection date, language, translation, page and exact scope. Distinguish evidence of a story being told from evidence of its events. Note which full documents remain unavailable."
    },
    {
      "title": "Investigate the central question",
      "body": "Locate the original Sinhala stories or images behind Upham's plates and compare attributed modern oral versions. Record spelling, teller, region and translation of spirit terms. Keep Mahasona, Gara Yaka and other figures distinct. Compare documented performance roles without diagnosing illness from folklore or treating masks as physical creature evidence."
    },
    {
      "title": "Compare explanations without merging evidence",
      "body": "Compare named figures and complete attributed versions rather than merging 'demon' labels. Separate recorded belief from an independently documented physical encounter. Preserve contradictions and unsuccessful searches; proposed work remains unperformed."
    }
  ]
}