SÍDH. Various occasional titles are used to designate the otherworld in early Irish, but the normal generic term for it is sídh (pl. sídhe). Its common currency in this sense is confirmed, if that were necessary, by the fact that it was borrowed by the author of the Old Welsh poem Preideu Annwn (The spoils of Annwn). The poem tells of a raid by Arthur and three shiploads of his followers on the otherworld stronghold of Kaer Sidi (from the Old Irish genitive sídhe) with the aim of carrying off the magic caldron of abundance which belonged to the lord of the otherworld. Annwn is a common term in Welsh for the otherworld, conceived in this instance as somewhere reached after a journey by boat but more generally described as somewhere beneath the ground. Similarly the Irish otherworld...