... A cavalry force, sent out from Cumberland, Md., under command of Lieutenant-Colonel Root, of the Fifteenth New York cavalry, returned, having effectually destroyed all the saltpetre works near Franklin, in Pendleton County .--the English steamer Mary Ann, while attempting to run the blockade of Wilmington, N. C., was captured by the Union steamer Grand Gulf.--the sloop G. Garibaldi was seized at Jupiter Inlet, Florida, ...