Secret Service

Outside, the softness of an April night; the verdure of tree and lawn, the climbing roses, already far advanced in that southern latitude, sweetly silvered in the moonlight. Within the great old house apparently an equal calm.
Yet, neither within nor without was the night absolutely soundless. Far away to the southward the cloudless horizon, easily visible from the slight eminence on which the house stood, was marked by quivering flashes of lurid light. From time to time, the attentive ear m...