MSS discussed incl. RIA 23 E 25 (LU), 23 P 12 (Book of Ballymote), 23 P 2 (Book of Lecan) (and its nine leaves now contained in TCD MS H 2. 17), D ii 1 (Book of Uí Mhaine) (and its four leaves now contained in Egerton 90); NLI G 1; TCD H 3. 17, E 4.1; Laud Misc. 610; Lost MS E (used by John Lynch).
Incl. sections on [1.] Areal distribution of the forms ní and cha; [2.] Transitional zone; [3.] Emphatic use of cha; [4.] Vowel quantity in cha; [5.] Diferential use of cha and ní; [6.] Origin and spread of cha.
Fergus Kelly, in Celtica 13 (1980), pp. 183-184.
Pierre-Yves Lambert, in ÉtC 17 (1980), pp. 343-347.