SRI LANKA / 1829 publication anchor for the selected historical retelling; no verified creature encounter date
Mahasona: the cemetery demon with a replacement head
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.
Sinhala folklore in Sri Lanka; southwest regional orientation · Approximate orientation marker for the named locality, not an exact encounter, burial, ritual or excavation position.
Assessment: A historical Mahasona narrative is documented. Literal transformation and supernatural illness causation remain unverified; local versions and terminology deserve fuller investigation.
Investigation and inspector’s assessment
The mystery and the documented account
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. [S1] [S2]
The question worth investigating
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.
Evidence, provenance and uncertainty
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. [S1] [S2]
Inspector’s assessment
A historical Mahasona narrative is documented. Literal transformation and supernatural illness causation remain unverified; local versions and terminology deserve fuller investigation.
Next research and discriminating evidence
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.
Documentary chronology
- 1829
Upham publishes the selected historical account. [S1]
- 1981–1982, contextual object
The Smithsonian dates collection of its different Gara Yaka mask to this interval. [S2]
- 10 August 1989, contextual object
The Gara Yaka mask is accessioned; this does not date the Mahasona tale. [S2]
- 30 September 2026
Eklipsis compiles this English documentary investigation from the named sources. No field visit or new eyewitness interview is claimed.
Dates distinguish the event, the creation of a record and its later publication. Approximate dates remain approximate.
Evidence ledger
Documented in the named record
Upham's historical publication includes the bear-head replacement story and cemetery association.
Not established by the selected evidence
The story establishes a living hybrid creature or proves supernatural causation of illness.
Editorial assessment; stated limits apply
A historical Mahasona narrative is documented. Literal transformation and supernatural illness causation remain unverified; local versions and terminology deserve fuller investigation.
Hypothesis review
A mythic transformation within differentiated spirit traditions
Supported documentary framework
- Supporting considerations
- The narrative and contrasting mask record show different assigned roles.
- Limits and objections
- The dossier has not traced all local-language versions.
- Discriminating test
- Compare named figures and complete attributed versions rather than merging 'demon' labels.
A literal hybrid causing illness
Not established
- Supporting considerations
- The historical story attributes powers to the figure.
- Limits and objections
- Retelling and representation are not biological or causal evidence.
- Discriminating test
- Separate recorded belief from an independently documented physical encounter.
Inspector’s next steps
Trace the earliest accessible record
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.
Investigate the central question
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.
Compare explanations without merging evidence
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.
These are proposed research tasks, not completed fieldwork or requests already sent to an archive.
Documents and source register
Original reports, scans, catalogue records and later analyses are identified separately. Alternate copies of the same document do not add independent evidence. Follow the named archive for full access information.
Edward Upham — The History and Doctrine of Buddhism, 1829
Primary evidence for this published version; colonial terminology and mediation require scrutiny.
Language: en
Open original source ↗Smithsonian — Gara Yaka devil-dance mask
A different, benevolent figure; contextual comparison only, not a Mahasona object or encounter.
Language: en
Open original source ↗Downloadable working files
The pack contains the English dossier, a structured case record, source register, chronology, evidence ledger, hypothesis comparison and inspector task sheet. Downloaded source documents, when available for redistribution, are identified in the pack manifest. Other documents remain direct source links.
- English dossier · Markdown
- Structured case · JSON
- Chronology · CSV
- Evidence ledger · CSV
- Hypothesis comparison · CSV
- Source register · CSV
- Inspector task sheet · Markdown
- File manifest and attribution · JSON
Eklipsis authored this synthesis and its working sheets. The original archives and researchers retain credit for their documents. This is a documentary investigation, not a claim that Eklipsis conducted the historical fieldwork.