# C1615 — Explain the13|7|3 division from its source-appointed anchors

## Question

What information generates the internal13-Jubilee leg of the SP11270 comparison?

## Sources

```json
[
  "SP_Jubilee_prefix.json",
  "File51a §16.3",
  "C1583"
]
```

## Opened utc

2026-09-29T15:01:40.596670+00:00

## Results

```json
{
  "civil_order": [
    "11206 BC",
    "4836 BC",
    "1406 BC",
    "AD65"
  ],
  "widths": [
    6370,
    3430,
    1470
  ],
  "units490": [
    13,
    7,
    3
  ],
  "source_constraints": {
    "SP_to_Conquest": 20,
    "MT_Flood_to_Conquest": 7,
    "Conquest_to_AD65": 3
  },
  "derived_first_leg": "20-7=13"
}
```

## Finding

SP supplies20 Jubilees to Conquest, MT supplies the retained7-Jubilee Flood leg, and Conquest→AD65 supplies3. The first13 is their20−7 difference.

## Reassessment

Insert the LXX self-retained cumulative Flood at its independently known location and inspect the finer units.

## Checks

```json
{}
```

## Closed utc

2026-09-29T15:01:40.597469+00:00

## Record provenance

Exact record hash: `25993f7cd88251a165205cfb891252375e64dd6e2560f43a3c38be2815b11452`

Source journal: `Research_Cycles/C1585_C1634/journal.json`