Figure 4. For each attachment, add the completed lifespan prefix to the chosen regular date. The three heads are separate derived placements of the same chain. Each head is a Year-6 position; its week opening is five years earlier and its close two years later. Spacing is schematic.

Sources: File 18 §§2.1–2.3 and 6A · File 09 §0.3.1.
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View the image versionMethuselah’s regular death at 2458 BC plus the first eight lifespans, 6848 years, gives a derived head at 9306 BC. Lamech’s regular death at 2463 plus the first nine lifespans, 7625, gives 10088. Arphaxad’s regular birth at 2456 plus Adam through Shem, 9175, gives 11631. All are Year-6 heads.