P [alliterative]
.In 1548, Placentius, a Dominican monk, wrote a poem of 253 hexameter verses (called Pugna Porcõrum), every word of which begins with the letter p. It opens thus:—
· 
· 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.