Not a man breathed for several seconds. Then a cloud of darker depth passed over the moon, and the silhouette of clutching branches faded out momentarily. At this there was a general cry; muffled with awe, but husky and almost identical from every throat. For the terror had not faded with the silhouette, and in a fearsome instant of deeper darkness the watchers saw wriggling at the treetop height a thousand tiny points of faint and unhalloed radiance, tipping each bough like the fire of St. Elmo or the flames that come down on the apostles’ heads at Pentecost. It was a monstrous constellation of unnatural light, like a glutted swarm of corpse-fed fireflies dancing hellish sarabands over an accursed marsh; and its colour was that same nameless intrusion which Ammi had come to recognise and dread. All the while the shaft of phosphorescence from the well was getting brighter and brighter, bringing to the minds of the huddled men, a sense of doom and abnormality which far outraced any image their conscious minds could form. It was no longer shining out; it was pouring out; and as the shapeless stream of unplaceable colour left the well it seemed to flow directly into the sky.