And, on the Achill line - between two of the MGWR's only two "proper" tunnels (as opposed to "cut'n'covers"),, which were outside Newport on the Westport side, and only a few hundred metres apart - there was a ghost.
When you got the train to Westport from Newport, you crossed the viaduct (still there) and entered tunnel no. 1. After exiting this, only seconds passed until you were in the other. IF IT WAS DARK, and no lights in the carriage, once you got out of one, there was a man in old-fashioned undertaker's clothes sitting opposite you. After you came out of the second, he had gone.