"Yes, colonel; but supposing you, a good man, and I, a sinner, were suddenly hit by a bomb——"

"But, doctor," Aurelle interrupted, "this science of yours is after all only an act of faith."

"How so, my boy? It is obvious that there are laws in this world. If I press the trigger of this revolver, the bullet

will fly out, and if General Webb is given an Army Corps, General Bramble will have a bilious attack."

"Quite so, doctor; you observe a few series linked together, and you conclude that the world is governed by laws. But the most important facts—life, thought, love—elude your observations. You may perhaps be sure that the sun is going to rise to-morrow morning, but you don't know what Colonel Parker is going to say next minute. Yet you assert that the colonel is a machine; that is because your religion tells you to."

"So does every one else's religion," said the doctor. "Only yesterday I read in the Bishop of Broadfield's message: 'The prayers for rain cannot take place this week, as the barometer is too high.'"

Far away over the plain, in the direction of Amiens, the star-sprinkled sky began to flicker with tiny, flashing points of light.

"Here they come," said Aurelle.

"They'll be ten minutes yet," said the doctor. They resumed their walk.

"O'Grady," Colonel Parker put in, "you're getting more crazy every day. You claim, if I comprehend your foolish ideas aright, that a scientist can foretell rain better than an Anglican bishop. What a magnificent paradox! Meteorology and medicine are far less solid sciences than theology. You say that the universe is governed by laws, don't you? Nothing is less certain. It is true that chance seems to have established a relative balance in the tiny corner of the universe which we inhabit, but there is nothing to show that this balance is going to last. If you were to press the trigger of this revolver to-morrow, it is just possible that it would not go off. It is also possible that the German aeroplanes will cease to fly, and that General Bramble will take a dislike to the gramophone.