E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
P [alliterative].
In 1548, Placentius, a Dominican monk, wrote a poem of 253 hexameter verses (called Pugna Porcrum), every word of which begins with the letter p. It opens thus:
1
Praise Pauls prize pigs prolific progeny.
In English heroics the letter A or T would be far more easy, as they would give us articles.