# 490d Mirror checkpoint after redirected C266

24 September 2026. Continues the existing C01–C265 research. Latest completed step: **C266 — 529 Axis Endpoint Ledger**.

## Direction and numbering

Dean supplied the comprehensive 4232/8464/12696 report and replaced the proposed AD1905–1911 task with its integration. He then authorized the bounded endpoint ledger. C266 names that completed ledger. **The former AD1905–1911 source-event search has not been executed.** C267 has not been executed.

## Retained result

Using inherited cumulative translations only:

| Profile | Translated Flood F | Translated Shem H | Reflected H |
|---|---|---|---|
| MT ON | [−6,1] | [−8,−1] | [1,8] |
| SP OFF | [−1,6] | [−3,4] | [−4,3] |
| LXX OFF | [0,7] | [−2,5] | [−5,2] |

All entries are signed pair centers. A paired coordinate uses components center±1/4. Center0 is JanuaryAD1; center1 is JanuaryAD2 and displays AD1t/2n. No civil year zero.

1. The chronological endpoint sequence **−6,−1,0,1,6,7,8** gives **5+1+1+5+1+1=14**. Omitting the internal center6 gives **5+1+1+6+1**. The final+1 is **AD7t/8n→AD8t/9n**.
2. For every profile, **H=F−2**, because the source lifespan is600 and the translation gain598. Consequently **M(H)=J₁(F)** with **J₁(x)=2−x**. This local reflection leaves global Mirror **M(x)=−x** unchanged.
3. Existing source endpoints give radius pairs **(−4,6), (−5,7), (−6,8)** about1: radii **5,6,7**. The declared local comparison chart **η(x)=1000(x−1)** gives the signed **5000/6000/7000** scaffold. This is a center/duration correspondence, not identity of macro source events or a physical 3D embedding.
4. **5290−4715=575=529×25/23**. Source gaps580 and574 produce **580−575=5**, **575−574=1**. SP ON normalization yields the inherited **120−115=5**. These are dependent descriptions of the same chosen configuration.
5. Chronological and radial selections are different traversals. The radial subset is **−6,−5,−4,1,6,7,8**, giving left-to-right **1+1+5+5+1+1**. Do not substitute it silently for the chronological sequence.
6. The source-qualified Creation support path **19320=598+3312+5520+9890** is retained for six admitted selectors. It supplies common source ancestry and named transformations, not a completed identification with every macro radius endpoint.
7. Preserve **7000/Year14** and **7500/Year15**. Two central7.5-year seasonal envelopes overlap0.5: their sum15 differs from outer union14.5. The center scaffold has radius7; farthest seasonal components have radius7.25. No source pair-center radius7.5 was supplied.

## Controls and evidence

Keep **K=529**, **E=25/23**, **P=70/69**, **ρ=radius**. The new branch report uses different symbols; its equations are unchanged.

Regular Gears remain **Noah/Shem/Flood only**. No cumulative Gear, upstream regular transport, primer reopening, arbitrary source date search, or z-law was introduced. SP uses official cumulative Terah145. LXX native ON and derived OFF retain distinct labels. The exact companion Conquest envelopes in the comprehensive branch report remain distinct from the primary envelope.

Current File_18 and File_09, the 208-node C127 graph, and earlier C265 evidence are unchanged. Original unprefixed Reports01–10 remain distinct from the C-series; interrupted original Reports11–25 remain unestablished. Earlier missing endpoints, source qualifications, and quarantines remain in force.

The C266 packet preserves ten frozen inputs, the report, source-tagged JSON/CSV ledgers, calculation code, an independent review, a certificate linked to C265, and an artifact manifest. **207 exact assertions pass; eight output files reproduce byte for byte in an isolated C266 replay.** These are verification assertions, not independent source witnesses. No earlier research campaign was rerun.

## Best next bounded step

**C267 — finite comparison of the remaining converted radius markers2500 and6250 and the7500 outer branch against the now-fixed local chart.** Use only the existing transformed fields. Distinguish source pair centers, individual seasonal components, generated midpoints, and envelope lengths. Preserve source lineage and the different conversion histories. High is sufficient.

Stop here unless Dean authorizes continuation. Publish each completed report and evidence checkpoint as work proceeds.