The Terror by Arthur Machen

It is time, I think, for me to make one point clear. I began this history with certain references to an extraordinary accident to an airman whose machine fell to the ground after collision with a huge flock of pigeons; and then to an explosion in a northern munition factory, an explosion as, I noted, of a very singular kind. Then I deserted the neighbourhood of London, and the northern district, and dwelt on a mysterious and terrible series of events which occurred in the summer of 1915 in a Welsh county, which I have named, for convenience, Meirion.

Well, let it be understood at once that all this detail that I have given about the occurrences in Meirion does not imply that the county in the far west was alone or especially afflicted by the terror that was over the land. They tell me that in the villages about Dartmoor the stout Devonshire hearts sank as men's hearts used to sink in the time of plague and pestilence. There was horror, too, about the Norfolk Broads, and far up by Perth no one would venture on the path that leads by Scone to the wooded heights above the Tay. And in the industrial districts: I met a man by chance one day in an odd London corner who spoke with horror of what a friend had told him.