Bragg did not know of their approach until the cannon fired.
Rosecrans' army is crossing the Tennessee river.

A part are already on Lookout Mountain.

Some of their cavalry scouts had captured some of our foraging parties in Wills valley.

The air was full of flying rumors.
Wagons are being packed, camps are broken up, and there is a general hubbub everywhere.

But your old soldier is always ready at a moment's notice.