"Keep off that!" I tore a piece off the rag I was wearing for a loin-cloth and tossed it on the polished surface of the stone.

It vanished instantly and left no trace; it did not even leave a mark on the stone, and the burning was so swift and complete that there was no smell.
"Thanks!" I said.

"But why your sudden anxiety on my account ?" He turned to King again.
"You have seen the _camera obscura_ that shows in darkness the scenery near at hand, provided the sun is shining?
The _camera obscura_ is a feeble imitation of the true idea.

There are no limits to the vision of him who understands true science.

What city do you wish to see ?" "Benares," King answered.
Suddenly we were in darkness.