...cer, (Black Republican,) of Thursday last: Gentlemen who arrived yesterday from Roane county report that they have recently had very exciting times in Roane and Wirt counties. Major Slemmer of General Rosencranz 's staff, was sent down to Spencer with a force sufficient to clean out the Secessionists of that vicinity. Unfortunately the coming of Stemmer was ascertained by them and they managed to escape fro...