December 8th. We hear to-day that Burnside has made up his mind to cross the river, and attack the rebel works in front. It hardly seems possible, as they are now fortified in the most approved manner, and garrisoned by the best army the Confederacy has in the field. At this season of the year, in this country, where the roads become bottomless pits on the first rain storm, it is impossible to campaign anyway, and whoever undertakes it is sure to be beaten; therefore we hope the rumor may prove untrue.
