There Bass a msaer in the city, yesterday, of the arrival of Col. C. C. Memminger. of South Carolina, who has beeu appointed by that Slate it.-, Commissioner to confer with the Ex ecutive authorities of Virginia on thedaagers now threatening the South. We are informed by Out, Munforrt, Seoreiary ot State, that he ii not expected before Saturday, and possible may norcotne at all.