“Familiar as one may be with the moor and all its moods, good and bad, at times there arises an acute consciousness of implacable, unrelenting, natural forces watchfully gathered all round, pressing closer as skies darken, wind sweeps by and rain or mist descends. The effect engendered is one of loneliness, littleness and helplessness, the border-line between an eerie feeling and plain fear being narrower than is sometimes realized.”