▁is ▁the ▁earliest ▁ext ant ▁literary ▁work ▁of ▁this ▁nature ▁left ▁to ▁us . ▁It ▁is ▁written ▁in ▁a ▁very ▁early ▁form ▁of ▁the ▁Se an - G ha eil ge , ▁and ▁the ▁Meter ▁has ▁an ▁old - f ashion ed ▁appearance , ▁more ▁so ▁than ▁the ▁rest ▁of ▁ ▁the ▁literature ▁of ▁this ▁period . ▁Exper ts ▁think ▁that ▁it ▁was ▁composed ▁by ▁D all án ▁F org a ill , ▁towards ▁the ▁end ▁of ▁the ▁ 6 th ▁century , ▁when ▁Col m ▁C ille ▁had ▁died . ▁ ▁Middle ▁G ael ic , ▁ 9 0 0 s ▁CE — 1 2 0 0 s ▁CE ▁ ▁Class ical ▁G ael ic , ▁ 1 2 0 0 s ▁CE — 1 7 8 0 s ▁CE ▁ ▁G ae il ge ▁and ▁G à id h lig , ▁ 1 7 8 0 s ▁CE — present ▁ ▁Main ▁articles ▁Early ▁Irish ▁literature ▁G ael ic ▁script   – ▁the ▁writing ▁system ▁used ▁for ▁Middle ▁Irish ▁and ▁Modern ▁Irish ▁ ▁References ▁ ▁External ▁links ▁G ael ic ▁Liter ature , ▁Language ▁& ▁Music ▁Compar ative ▁Reading ▁of ▁Man x ▁Cultural ▁Rev iv als ▁G ael ic ▁Liter ature ▁Modern ▁G ael ic ▁Liter ature ▁The ▁G ael ic ▁Liter ature ▁of ▁Ar gy ll ▁G ael ic ▁Liter ature ▁Cla re ' s ▁G ael ic ▁B ard ic ▁Trad ition ▁G A EL IC ▁L IT ER AT URE ▁IN ▁THE ▁N IN ET E ENT H