An additional source of vowel length is compensatory lengthening before lost consonants in certain circumstances, cf. "pâri" "father" < Latin , "vôli" "eye" < Latin , "lîre" "pound" < Latin . This produces long vowels in non-final syllables, and was apparently a separate, later development than the primary lengthening in open syllables. Note, for example, the development of Vulgar Latin in this context: > > "iê" , as in "piêre" "stone" < Latin , differing from the outcome in originally open syllables (see above).