In 1887, John Bartholomew's Gazetteer of the British Isles described Errigal Trough like this:
Errigal Trough, par., cos. Monaghan and Tyrone, on river Blackwater, 2 miles SE. of Augher, 24,788 ac., pop. 5256.
GB Historical GIS / University of Portsmouth, History of Errigal Trough, in and County Monaghan | Map and description, A Vision of Ireland through Time.
URL: https://www.visionofireland.org/place/28111
Date accessed: 01st October 2024
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