> Could the double "ss" be due to a confusion of the scribe of
> "is i ngalur" and "is sí..."?
I don't think so. The woman is talking to, and about, her husband
here: "7 atrubart iss i n-galur robaduse".
> I think I read somewhere (maybe in GOI) that single "s" is more
> consistently used after long vowels, e.g. "grés". But I can't say
> if the evidence really bears this out.
My gut feeling is that 'ss' could be used like initial 'h', to add
bulk or "presence" to a small word. A word like "grés" is visually
"small", but the long vowel gives it more stature than "ass", to
the ear at any rate.
> I think I said it before, but I don't think that we should try to
> apply a single rule regarding "s" vs. "ss" across the board. This
> would create something extremely artificial. What we perhaps could
> rather try is to be consistent in the spelling of individual words.
> What we could do is write "dos·airret" which retains the ambiguity.
* As for the .v.v. above, who will explain the game here? ;-)