As abruptly it was broken again by a similar exhibition; only this time the fire was blue. Blue was followed by purple, purple by red. Then ensued the briefest possible pause, in which a figure moved across the bars of light escaping through the chinks of the laboratory, and then the whole valley blazed with patches of vari-coloured fire. It was not a reflection: it was actual physical conflagration of the solid rock, in irregular areas. Some of the fire shapes were most fantastic. And with the unexpectedness of a bursting shell the surface of the ground before our feet crackled into a ghastly blue flame. The Nigger uttered a cry in his throat and disappeared. I felt a sharp breath on my neck, an ejaculation of surprise at my very ear. It was startling enough to scare the soul out of a man, but I held fast and was just about to step forward, when my collar was twisted tight from behind. I raised both hands, felt steel, and knew that I was in the grasp of Handy Solomon's claw. The sailor had me foul. I did my best to twist around, to unbutton the collar, but in vain. I felt my wind leaving me, the ghastly blue light was shot with red. Distinctly I heard the man's sharp intaken breath as some new phenomenon met his eye, and his great oath as he swore. "By the mother of God!" he cried, "it's the devil." Then I was jerked off my feet, and the next I knew I was lying on my back, very wet, on the beach; the day was breaking, and the men, quite sober, were talking vehemently. It was impossible to make out what they said, but as Handy Solomon and the Nigger were the centre of discussion, I could imagine the subject. I felt very stiff and sore and hazy in my mind. My neck was lame from the dragging and my tongue dry from the choking. For some time I lay in a half-torpor watching the lilac of dawn change to the rose of sunrise, utterly indifferent to everything. They had thrown me down across the first rise of the little sand dunes back of the tide sands, and from it I could at once look out over the sea full of the restless shadows of dawn, and the land narrowing to the mouth of the arroyo. I remember wondering whether Captain Selover were up yet. Then with a sharp stab at the heart I remembered. The thought was like a dash of cold water in clearing my faculties. I raised my head. Seaward a white gull had caught the first rays of the sun beyond the cliffs. Landward--I saw with a choke in my throat--a figure emerging from the arroyo. At the sight I made a desperate attempt to move, but with the effort discovered that I was again bound. My stirring thus called Pulz's attention. Before I could look away he had followed the direction of my gaze. The discussion instantly ceased. They waited in grim silence. I did not know what to do. Percy Darrow, carrying some sort of large book, was walking rapidly toward us. Perdosa had disappeared. Thrackles after an instant came and sat beside me and clapped his big hand over my mouth. It was horrible.