Not that Mr Burnett had anything really to reproach himself with, for he was in the forties, some years above military age. But he was a widower without a family, who had already spent fifteen years in a sparsely inhabited parish in the south-east of Scotland not very far from the Border; and ever since he lost his wife had been uneasy in mind and a little morbid, and anxious for change of scene and fresh experiences. He was to get them, and little though he dreamt it, that group was their beginning. Indeed, it would have taken as cunning a brain to scent danger in the trifling incidents with which his strange adventure began as it took to arrange them. And Mr Burnett was not at all cunning, being a simple, quiet man. In appearance he was rather tall, with a clean-shaven, thoughtful face, and hair beginning to turn grey. A few days later a newspaper arrived by post. He had received several already from well-meaning friends, each with that group in it, and he sighed as he opened this one. It was quite a different paper, however, with no illustrations, but with a certain page indicated in blue pencil, and a blue pencil mark in the margin of that page. What his attention was called to was simply the announcement that the Rev. Mr Maxwell, minister of the parish of Myredale, had been appointed to another charge, and that there was now a vacancy there. Mr Burnett looked at the wrapper, but his name and address had been typewritten and gave him no clue. He wondered who had sent him the paper, and then his thoughts naturally turned to the vacant parish. He knew that it lay in a certain group of northern islands, which we may call here the Windy Isles, and he presumed that the stipend would not be great. Still, it was probably a better living than his own small parish, and as for its remoteness, well, he liked quiet, out-of-the-way places, and it would certainly be a complete change of scene. He let the matter lie in the back of his mind, and there it would very likely have remained but for a curious circumstance on the following Sunday. His little parish church was seldom visited by strangers, and when by any chance one did appear, the minister was very quickly conscious of the fact. He always took stock of his congregation during the first psalm, and on this Sabbath his experienced eye had noted a stranger before the end of the opening verse. A pleasant-looking gentleman in spectacles he appeared to be, and of a most exemplary and devout habit of mind. In fact, he hardly once seemed to take his spectacled gaze off the minister's face during the whole service; and Mr Burnett believed in giving his congregation good measure.