In historical English grammar it is regularly assumed that Gmc. initial [f s þ] became voiced before voiced sounds in southern England at some time in the Old or early Middle English period. For the present purpose, Wright's description of the change is sufficiently representative: ‘The initial voiceless spirants f, s, þ became the voiced spirants v, z, ð in late OE. or early ME. in Kentish and the southern, especially the south-western dialects, as vader, vat, vlesch, vrend; zaule zǫule, zinne zenne zünne “sin”, ðat ðet, ðing. The modern dialects show that this voicing of the initial voiceless spirants must have taken place at an early period, because it is almost exclusively confined to native words, hence the change must have taken place before the great influx of Anglo-Norman words into these dialects. The use of the initial voiced for the voiceless spirants is now obsolete in Ken., Sur., Sus., and obsolescent in s. Pem., Hamp., and the I.W., but it is still in general use in east Hrf., parts of Glo., west Brks., Wil., Som., and Dev.‘