>>> a) "Erg ass tra a fecht sa," ol in ben
> DIL also points out that phrases like "i fecht-so" could contain
> the preposition "i". But it is unlikely that our "a" is a spelling
> for "i". I can't remember that there have been many confusions of
> the two by the scribe of a) so far.
I think just once so far, in Para. 6 of MS (a):
"A comuitecht do s*luaig-si" = hi comaitecht...
An instance of "i fecht-sa" from the MI "Aislinge Meic Con Glinne":
"Indis in t-aislingi dún i fecht-sa."