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Letter Mine, Letter, Mizen Peninsula, Co. Cork, Ireland

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Latitude & Longitude (WGS84): 51° 33' 42'' North , 9° 31' 7'' West
Latitude & Longitude (decimal): 51.5616666667, -9.51861111111

Baryte and copper mine worked sporadically from 1852-1893. The majority of mining (for baryte) took place from 1889-1893 with 800 tons being produced.

A blocked up adit level is visible today along with several fenced off ?collapses or pits. A considerable amount of spoil also remains and is highly similar to material found at Ballycummisk mine.

Main site and area of spoil at ITM 494719 535432

Mineral List

12 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Dr. Richard Unitt & Barry Flannery (personal observations 22-1-11)

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