The Welsh bardic grammars on Litterae

The first part of this chapter considers the relatively straightforward relationship between the section on letters in Gramadegau Penceirddiaid (GP), the Welsh vernacular grammars, and the section on Litterae in Donatus’s Ars Maior. It then goes on to consider the more problematic case of how the voiced dental fricative /ð/, now written in Welsh with a double dd, was spelt in the different versions of GP. In particular the adoption of the Latin abbreviation for que as a spelling for /ð/ in the Peniarth 20 version is considered in the context of the development of consistent orthographies in late Middle Welsh.