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.
1. Scottish Gaelic influence [on Ulster Ir.]; 2. O’Rahilly’s theory [cf. Best² 527]; 3. Present for future in Ulster Irish; 4. Present for future in Early Irish; 5. A reconstruction of the data; 6. An alternative interpretation [cha associated with ‘informal’ style in Ulster].