From Columbus and Cairo.
Memphis, Dec. 13.
--Great commotion prevailed at Columbus yesterday.
Mora troops have been sent to Gen. Bowen, at Feliciana; also a regiment to Union City.
The Federals at Calve have changed their policy.
No one is now allowed to leave there, and all communication has ceased.
The Government transports remain idle in the day time, but are busy at night.
It is supposed in high official quarters that the Federals are moving in immense force up the Tennessee river, in order to cut off communication with Bowling Green.