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An early Irish historical compilation, now lost, which is referred to thirteen times in the Annals of Ulster in various entries between the years 467 and 629 (i.e. 467, 468, 471, 475, 482, 490, 545, 553, 599, 601, 603, 611, 629). Mc Carthy suggests that this work was completed in c. 1022 and written by Cuán úa Lothcháin (d. 1024).