Set of index cards describing some of the local features of Cnoc na Gairfine [Knocknagarrivhan]. Included are descriptions of Loch na Gairfine, Loch na bhFreangach, Loch an Damba, and Loch na hAille. Peter Flaherty, and Mr. Walsh of Muic na Coille are credited with providing some of the local information.

Set of index cards describing some of the local features of the townland of Cnocnaraw [Cnoc na Rátha]. Descriptions are given of Crocnaraw, formerly known as Rockfield House, which was an orphanage run by Protestant clergymen known as The Forty Boys. Two white quartz boulders known as the Standing Stones, an enclosure, and Maam Green are also described. Mike Gibbons is credited as being a source of some of the information.

Two cards relating to Aasleagh Falls [Eas Liath], Co. Mayo

Set of index cards describing some of the features of the townland of Coill Sáile [Kylesalia]. Features described include Carraig an Chomair, Crompán Choille Sáile, Sruthán na mBrácaí, An Chara Dhubh, Flannery Bridge, Cloch na dTaibhsí, An Garraí Graf, An Meall, Crompán Thaidhg na Buile, Na Caisleáin, Cora Ró Dúgáin, Meall Gorm, Ros Cam, Crompán Lannach, Aill Uaithne, An Criathrach Mór, Loch na Teorann, Cloch Ádhbhach, Ros Dubhgáin, and Tobar Cholm Cille. Pat Sullivan, Professor Seán de Courcy, Seán Dundass, Pádraic MacDonncha, and Máire Canavan all credited with providing information.

Set of index cards describing some of the local features of the townland of Coolacloy, [Cúl an Chlaí]. Included are descriptions of Hog Island, the Coast Guard Station, Cuan an Bhaidhe, Oileán na nÚan, Cúl an Chruit, Tiompán, Maol an Bhreallaigh, The Boat Rock, Cuan na Loinge, Carraig an Tí, Tóin na Leachtaí, and Béal an tSrutha. Local man Patrick Joyce is credited with providing some of the local information.

Set of index cards describing some of the local features of the townland of Coorhoor/Courhoor, [An Corrbhóthar]. Included are a description of a Crannóg, a pre-bog wall, and Scailp Val, named after Valentine Jordan, a notorious character who fled here from Mayo in 1798. Mike Gibbon is credited as being a local source of information.

Index card relating to the townland of Coosaun, [An Cuasán].

Three index cards relating to the townland Cora Bheithe [Curraveha or Birchhall].

Index card for the townland of Cornarona, [Cor na Rón]. Loughuggamore, and the Crimlin River are inclued in the descriptions of this area.

Two index cards relating to the townland of Corranellistrum, [Corr an Fheileastraim].