powder. He was not sure just where the magazine was; not sure how long the train would burn before the explosion. So down he clambered again, searching at the great altar for the water-vessels he knew should be there. Then, with a jar of water, he returned to his train, and swiftly swept up the dry powder and moistened it a little, making a rough slow match of it.

“Now we’ll see the sights!” he growled, and went to the end of the gallery and flung his torch into the train.

He watched it for a moment, to be sure that it would burn, then stepped down from the ledge and drew back a safe distance to watch the upheaval. To what extent the mine was intended to destroy he had no idea. He simply knew that Dolores had pointed it out to him as a means of defense should the gallery