From Trans Mississippi.
Mobile, Dec. 5.
--The Keening, News has late advices from the Trans-Mississippi country.
Scolt, the publisher of the Wanderer, at Covington, states that the Yankees were defeated by Gen. Green at Plaquemines, with the loss of 2,000 prisoners, on the 27th of November. Navigation of the river was virtually closed.
On the 20th Capt. Scott attacked 200 Yankee cavalry at the Plains store, five miles below Port Hudson, driving them into the latter place, killing and wounding thirteen men, and capturing nine or ten horses and their equipments.
Our loss none.
On the 28th Lieut. Powell captured three valuable cases of medicine near Port Hudson, and thirteen prisoners from sunken transport.
The garrison at Port Hudson numbers 2,000 strong, mostly negroes. 