When the wind blows this way you can hear the rumble of the guns.

Ah, there it is now, Mr.Scott!" John distinctly heard that low, sinister menace, coming from the east, and he knew what it was.

Why should he not?
He had listened to it for days and days.

It was easy enough now to tell the thunder of the artillery from real thunder.

He was quite sure that it had never ceased while he was unconscious.