The Laggan of Donegal


On looking at a map of the county Donegal, it will be seen that the north-eastern part of the county, which is the most northerly part of Ireland is a peninsula washed on the eastern side by the waters of Lough Foyle and on the western by Lough Swilly. This is Inishowen, a mountainous and, to a large extend, a barren country. Immediately to the south of it is a fertile and comparatively flat country lying between the river Foyle and the upper reaches of lough Swilly, and extending in one direction from the City of Derry to Stranorlar, and in another from Lifford to Letterkenny. This is the district which in by-gone times was well and widely known under the name of THE LAGGAN, and formed the most productive and desirable portion of the ancient territory of Tyrconnell. Never having been at any time a county or fiscal division of any kind its boundaries were never accurately defined, but roughly speaking it might be said to correspond to the north Barony of Raphoe, running for a short distance, and its southern end into the south Barony.

In Tyrconnel, between two arms of the sea-that is, between the bat of Lough Foyle and the bay of Swilly’

The name would appear to be a very old one. It has been suggested, and not without good reason, that it is the place referred to by Ptolemy, a Greek writer who lived in the second century of the  Christian era, and who wrote a description of the Western world, as the logia, and which in aftertimes is called Locha by the Irish, and Logan by the early English writers. This conjecture is corroborated,  and , indeed made  almost a certainty, by the fact that Ptolemy speaks of two large waters or rivers adjoining the logia, which he calls the Argita and the Vidua, the former of which antiquaries and geographers of by gone times regarded as the Finn or river of Lough Foyle and the latters as Lough Swilly. Colgan, in his’’acta’’, describes the Laggan as ‘’In Tir-conallia, interdue maris brachia, nempe inter sinum Loch FEBHUIL, ET SINUM DE Suilech’’. (In Tyrconnel, between two arms of the sea-that is, between the bat of Lough Foyle and the bay of Swilly’’.)