>> Da radh dol fainth(?)dil
>> Then there is a letter with a lenition mark over it. The letter
>> looks like a 't', but it is pretty scrappy.
>Could that dot be a true punctum delens here? That would give
>"faindil", possibly the genitive of "faindel", a variant of
>"foíndel". There's an idiom "dul for foíndel", but could the
>verbal noun "dol/dul" simply be followed by a noun in the
>genitive: "a going of vagrancy = a going astray" ?
Where a scribe intends to delete a letter, I think this is usually done
by putting the punctum delens under the letter, not on top. The other
problem is that 'faindil' deprives us of our final monosyllabic word.
>I wonder if "d-an" the last line could be "dúan"?
>> Logh dar d-an do dligh
>= a reward for our poem ...
Yes, certainly. A suspension stroke can stand for a single vowel.