Catriona by Robert Louis Stevenson

I have yet said little of the Highlanders. They were all three of the followers of James More, which bound the accusation very tight about their master's neck. All understood a word or two of English; but Neil was the only one who judged he had enough of it for general converse, in which (when once he got embarked) his company was often tempted to the contrary opinion. They were tractable, simple creatures; showed much more courtesy than might have been expected from their raggedness and their uncouth appearance, and fell spontaneously to be like three servants for Andie and myself.

Dwelling in that isolated place, in the old falling ruins of a prison, and among endless strange sounds of the sea and the seabirds, I thought I perceived in them early the effects of superstitious fear. When there was nothing doing they would either lie and sleep, for which their appetite appeared insatiable, or Neil would entertain the others with stories which seemed always of a terrifying strain. If neither of these delights were within reach -- if perhaps two were sleeping and the third could find no means to follow their example -- I would see him sit and listen and look about him in a progression of uneasiness, starting, his face blenching, his hands clutched, a man strung like a bow. The nature of these fears I had never an occasion to find out, but the sight of them was catching, and the nature of the place that we were in favourable to alarms. I can find no word for it in the English, but Andie had an expression for it in the Scots from which he never varied.