Note 664 — from the Origins To the Renaissance (continued 7)

Langland's lines usually contain four accentuated syllables, two in each half line; the two accentuated syllables of the first half line, and the first accentuated syllable of the second half line are alliterated, and commence by the same "rhyme-letter:"

(B. Prol. 2.) It is not necessary for alliteration to exist that the letters be exactly the same; if they are consonants, nothing more is wanted than a certain similitude in their sounds; if they are vowels even less suffices; it is enough that all be vowels.