...art of the force went by land and part on schoonners, the latter being convoyed by two gunboats. It was surmised that the expedition was to attack Weldon, N. C., an important railroad centre. Mackey's Point , S. C., was this day bombarded by a part of the Union blockading squadron.--A company of rebel cavalry were captured in the vicinity of Cotton Creek, Fla., by a scouting-party of Union troops. ...