...Com. Harwood's Despatch. To-day an engagement took place on the Bayou Teche, La., between four Union gunboats, under the command of Commodore Buchanan, assisted by a force of troops, under General Weitzel , and the iron-clad rebel steamer J. A. Cotton, assisted by a body of rebel troops, under the command of Colonel Gray, resulting, after a contest of several hours' duration, in the destruction of the ...