Time was given the enemy to collect armies and fortify his new positions; and twice afterwards he came near forcing his north-western front up to the Ohio River.
I promptly informed the department commander of our success at Fort Donelson and that the way was open now to Clarksville and Nashville; and that unless I received orders to the contrary I should take Clarksville on the 21st and Nashville about the 1st of March.

Both these places are on the Cumberland River above Fort Donelson.

As I heard nothing from headquarters on the subject, General C.F.Smith was sent to Clarksville at the time designated and found the place evacuated.

The capture of forts Henry and Donelson had broken the line the enemy had taken from Columbus to Bowling Green, and it was known that he was falling back from the eastern point of this line and that Buell was following, or at least advancing.

I should have sent troops to Nashville at the time I sent to Clarksville, but my transportation was limited and there were many prisoners to be forwarded north.
None of the reinforcements from Buell's army arrived until the 24th of February.