67. In general, the double consonants became single, in the 9th or 10th
century (perhaps earlier before the accent), but underwent no other
change save those described in §§ 63, 64: _abbātem_ ＞ abat, _sĭccum_
＞ sẹc, _rĕddo_ ＞ ręt, _affībulāre_ ＞ afiblar, _aggregāre_ ＞ agregar,
_flamma_ ＞ flama, _pĭnna_ ＞ pẹna, _cappa_ ＞ capa, _passum_ ＞ pas,[58]
_mŭttum_ ＞ mọt, _advenīre_ ✱_avvenīre_ ＞ avenir.
(1) Cc before a, in the east and northeast, became tš; elsewhere, c;
_bŭcca_ ＞ bọca bọcha, _vacca_ ＞ vaca vacha.
(2) Ll, in some southern dialects, became l´; elsewhere, l: _capĭllum_
＞ cabẹl cabẹlh, _grȳllum_ ＞ gril grilh, _mantĕllum_ ＞ mantęl
mantęlh, _villānus_ ＞ vilas vilhas. It is possible, however, that -llī
regularly became l´ in Limousin, while ll before other vowels was not
palatalized: _caballum_ ＞ caval, _caballī_ ＞ cavalh; _ĭllī_ ＞ ilh,
_ĭllōs_ ＞ ẹls; this would account in part for the frequent occurrence
of _lh_ in the poems. So in some dialects -nnī ＞ n´: _annī_ ＞ anh. Cf.
§ 51, 1. For final ls and l, see § 65, L: _ĭllos_ ＞ ẹls ẹus, _vallem_
＞ val vau. For Gascon l ＞ r, see § 10: _appĕllat_ ＞ apęla apęra.
(3) Rr, when intervocalic, seems generally to have been distinguished
from r during the literary period and later: _cŭrrĕre_ ＞ cọrre,
✱_corrŭptiāre_ ＞ corrossar, _errāre_ ＞ errar, _tĕrra_ ＞ tęrra.
Occasionally, however, rr is found in rhyme with r.