Sunday is a fixed star," he said.
"You shall see him a falling star," said Syme, and put on his hat.
The decision of his gesture drew the Professor vaguely to his feet.
"Have you any idea," he asked, with a sort of benevolent bewilderment, "exactly where you are going?"
"Yes," replied Syme shortly, "I am going to prevent this bomb being thrown in Paris."
"Have you any conception how?" inquired the other.
"No," said Syme with equal decision.

Autor: G.K. Chesterton