Every source numbered once, permanently.
This is the reference spine of the timelines project. Every source used by any period page holds one master number, issued once and never reused or renumbered; new sources are appended as coverage grows. Reference codes on every page read source . work . passage — 9.1.83 is source 9 (Suetonius), work 1 (Divus Julius), chapter 83 — and mean the same thing on every page, forever. Missing sources are entries in the same register: what is lost is part of the record.
Nothing in this list links out: these works are lost — their absence is the entry.
Master numbers are permanent: issued once, never reused, never renumbered. Period pages display their relevant subset and keep these numbers. Register entries record: author · written when · distance from events · relationship to power · what it preserves · survival condition.
Register in use by: Rome and Egypt, 100–30 BC · Abraham and the Patriarchs, c. 2100–1600 BC · The Julii, Troy to the Ides.