Letter 10

Hilary of RomeUnknown|pope hilary
From: Victorius of Aquitaine, computist
To: Hilary of Rome, archdeacon (later Pope)
Date: ~457 AD
Context: Pope Hilary's letter 3 — Victorius responds to Hilary's request, explaining his approach to the Easter computation problem.

Victorius of Aquitaine, servant of the church, to the most holy Hilary, archdeacon of Rome, greetings.

I have undertaken the work you requested: the production of a paschal table that resolves, insofar as it can be resolved, the divergence between the Roman and Alexandrian computations.

The work is done. I send it to you with this letter in the hope that it will prove useful, though I want to explain the approach I have taken and its limitations.

The fundamental difficulty is that the Roman and Alexandrian tables rest on different astronomical cycles. Reconciling them perfectly is not mathematically possible without adopting one as the standard and abandoning the other. What I have done is produce a table that follows the Alexandrian cycle — which I believe to be more astronomically accurate — while presenting it in a form that makes the divergences from the Roman tradition transparent, so that those who use it can understand where and why the two traditions differ.

This table will not end all controversy, because the controversy is partly theological and not purely mathematical. But it should provide a clearer basis for discussion.

Victorius, your servant in this work

Modern English rendering for readability. See the 19th-century translation or original Latin/Greek for scholarly use.