Carn Furbaide, the cairn of Furbaide Fer Benn son of Conchobar and Eithne Úathach, seems to be on Carn Hill in Co. Longford, a proverbial stone’s throw from Midir’s sid on Brí Leith / Ardagh Hill. (See Hogan’s Onomasticon Goedelicum, Letter C). As ever, terms with notes below are in bold, and the notes are…