Venturing further into the great hall, I climbed an iron ladder onto a block of stone. From this vantage point, 20 feet above the floor, I found my picture: two men at work squaring another block with an electric diamond-wire saw. One of the men, astride the block, stood between me and the lamp they were using. I set up my tripod, stepped under the dark-cloth, and saw the most sublime vision on the groundglass. The man on the block was silhouetted before the opal light from another chamber, embraced by a luminous halo.