In the section Fiat Voluntas Tua, the Poet receives some mention through the hindsight of history (emphasis mine):
the fable had probably arisen out of the story that one of the early Hannegans had been given a glass eyeball by a brilliant physical theorist who was his protege - Zerchi could not remember whether the scientist had been Esser Shon or Pfardentrott - and who told the prince that it had belonged to a poet who had died for the Faith. He had not specified which faith the poet had died for - that of Peter or that of the Texarkanan schismatics - but evidently the Hannegan had valued it, for he had mounted the eyeball in the clutch of a small golden hand which was still worn upon certain state occasions by princes of the Harq - Hannegan dynasty.
However, the Poet
died in some unnamed skirmish, shot in the belly after leaping out of some bushes at a cavalry officer who had just run down a fleeing refugee woman with a dull saber.
This hardly seems to be a death tied to faith, regardless of which faith you are referring to.
How would details of his death have wound up in the histories? Is there any basis for the claim, or was this just Miller's way of showing the distortions of fact that can find their way into history?