Against one wall was a plaster of Paris plaque of an O'Callahan in a Roman helmet.

"He'll always be lame," the surgeon said, wiping his hands and gazing down at Michael, who lay, for the most part of him, a motionless prisoner set in plaster of Paris.

I saw iron ladles, pans full of white sand, files with white metal left glittering in their teeth, molds of plaster of Paris, bags containing the same material in powder, a powerful machine with the name and use of which I was theoretically not unacquainted, white metal in a partially-fused state, bottles of aquafortis, dies scattered over a dresser, crucibles, sandpaper, bars of metal, and edged tools in plenty, of the strangest construction.