Thanks, Dennis.  Here's the last line. All comments welcome.   

LU conid Táin bó Flidais a scél sin anuas.


The variants below.  

LL   Is disein atá Tain Bó Flidais i rremscelaib na Tána.

EG  & is de-sin ata Tain bo Fliduis hi remsgeluib Tano bo Cuailnge.  

LFF   & desin ata Tain Bó Fleighisi F-- i--n--i  d--

(I suspect the last word in LFF is 'Finid' with wavy lines between the letters to 
stretch out the word so that it would reach to the end of the line of script.   
But I can't explain the 'd' at the end of the word.  I would expect Latin  'finis' 
(end).  Or maybe the word is 'fini' (dative singular of 'finis') and the 'd--' at the 
end indicates something else.)    Liz