Corpus of Electronic Texts Edition
The Second Battle of Moytura (Author: [unknown])

section 9

The Tuath Dé came with a great fleet unto Ireland to take it perforce from the Fir Bolg. They burnt their barques at once on reaching the district of Corcu-Belgatan that is, Connemara today, so that they should not think of retreating to them; and the smoke and the mist that came from the vessels filled the neighbouring land and air. Therefore it was conceived that they had arrived in clouds of mist.