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In 1887, John Bartholomew's Gazetteer of the British Isles described Costello like this:
Costelloe, bar., W. co. Mayo, 143,874 ac., pop. 46,849.
How to reference this page:
GB Historical GIS / University of Portsmouth, History of Costello, in and County Mayo | Map and description, A Vision of Britain through Time.
URL: https://www.visionofbritain.org.uk/place/30686
Date accessed: 08th April 2026
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Costello".
