Old Irish is the language of Ireland in the period from the 8th to the 10th century AD, and is the oldest Celtic language well enough attested for adequate grammatical study. The book provides the only available detailed linguistic analysis of the syntactic structure of the Old Irish sentence. The basic form of the simple sentence, with the usual order of elements, verb-subject-object, is unproblematic from a synchronic viewpoint, but certain sentence types show more complex patterns of syntax, which have important implications for the typological, diachronic and comparative-historical...