A similar change occurred in British in which only stressed I and us were lowered and the lowering was caused by original long a and by the final -- a in Latin loanwords. This change is not Common Insular Celtic because it postdates raising in Goidelic and raising is not Common Insular Celtic sound change." (Tristram, 2007, p.100)

Tristram writes that in Goidelic "syncope is a completely regular process" which impacts every second syllable of a polysyllabic word, counting the last syllable (following the syncope). And in all likelihood occurring at the last of the Ogam period in the middle of the 6th century. Paraphrased) Stated to be a common morphological innovation "was the creation of conjugated prepositions or preposition nouns from earlier prepositions which were followed by inflected forms of pronouns both in British and Goidelic languages and personal pronouns merged with prepositions into "conjugated prepositions." (2007, p.101) the...
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