“Now, watch closely,” said Dr. Silence, speaking loud, “for after the cry will come the Fire!”

I began to tremble involuntarily; an awful change had come without warning into the air; my legs grew weak as paper beneath my weight and I had to support myself by leaning on the table. Colonel Wragge, I saw, was also leaning forward with a kind of droop. The shapes of fire had vanished all, but his face was lit by the red lamps and the pale, shifting moonlight rose behind him like mist.

We were both gazing at the bowl, now almost empty; the Colonel stooped so low I feared every minute he would lose his balance and drop into it; and the shadow, that had so long been in process of forming, now at length began to assume material outline in the air before us.