Put out the Light! The ghost in the following famous tale had a purpose.

He was a Highland ghost, a Campbell, and desired vengeance on a Macniven, who murdered him.

The ghost, practically, "cried Cruachan," and tried to rouse the clan.

Failing in this, owing to Inverawe's loyalty to his oath, the ghost uttered a prophecy.
The tale is given in the words of Miss Elspeth Campbell, who collected it at Inverawe from a Highland narrator.

She adds a curious supplementary tradition in the Argyle family.
TICONDEROGA It was one evening in the summer of the year 1755 that Campbell of Inverawe {157} was on Cruachan hill side.