Reconciling Three Conflicting Dates for a Medieval Tamil Ruler

The objects use different chronological systems:

• Object A uses a regnal year ('the eighth year of the king's reign'). A regnal date gives an interval from an accession whose absolute date must be supplied from another source. It also may be a later copy, as the script and wording suggest.
• Object B uses the Saka era, a solar calendar used in many Indian inscriptions. Saka 1050 corresponds to a specific year in the Common Era, but the inscription may be damaged or the date may refer to a donation rather than the king's accession.
• Object C uses the Hijri calendar, a lunar calendar. A Hijri year is shorter than a solar year, so conversion requires a formula or table and cannot be treated as if it were a Western year.

Averaging is invalid because the dates are not three measurements of the same event. Object A dates a regnal interval; Object B may date a temple donation; Object C dates an accession. They must be converted into a common system, checked for what event each actually records, and then tested for consistency. An average would create a false precision.

Reliability depends on provenance, purpose, and date, not on script or language alone.

• Object B, the temple inscription, is likely the strongest primary evidence if it is genuine and legible. It is a contemporary public record, tied to a place and a donor, and it uses a datable era. It can establish that the king was recognised in that locality around Saka 1050. Its weakness is that it may date the donation, not the accession.
• Object C, the Persian chronicle, is secondary and later, but it may preserve court or regional memory. It can establish a rough accession horizon and a political event, but its Hijri date must be converted and its bias assessed. Chronicles often round dates or align them with moral lessons.
• Object A, the copper-plate grant, is the weakest for chronology here because it is undated in absolute terms and its later-looking script suggests a copy or forgery. It can establish a claim about the king's eighth regnal year, but not the year itself. It is more useful for administrative and donative practice than for dating.

The ranking is therefore B > C > A for chronology, but each source answers a different question.

The method should be convergence with explicit uncertainty:

1. Convert Saka 1050 and Hijri 442 into the Common Era using standard conversion tables, noting the month if available.
2. Identify the event each date refers to: accession, regnal year 8, or a donation.
3. Check synchronisms: does the temple inscription name a donor or neighbour also known from the chronicle? Does the copper plate's regnal year fit a plausible accession window?
4. Weight the sources: contemporary inscription first, later chronicle second, undated copy last.
5. State a range, not a point date, unless a contemporary source gives an exact accession date.

A timeline panel could say: 'This ruler is attested in a temple inscription of Saka 1050 and in a later Persian chronicle. His accession is usually placed in the mid-eleventh century CE; the exact year is uncertain because the copper-plate grant is undated and may be a later copy.' This is honest, uses the sources, and avoids the false authority of a single exact year.