Jaro, JL'eb. ', 1802. The grand expedition up tho Tennessce and Cumberland Itivers is about t start. The last of it moves in tho morning. It will attack Forts flenry and Donelson. The force to bo eng.iged is fully 2-2,000 men. Tho military authorities will not pormit any dispatchcs relating to the expedition to be sent. Gen. Grant and staff left hcre tonight. Cairo, Pek 3-12 A. M. Twelve steamers laden with troops, in charge of Commodore Wasli. Graham, left here this morning at 10 o'elock, to oin a still larger force at another point. í can truly say that this has erery indication of a genuiue, active movement, and that something important will be aocomplishad. It may be looked for ero they return, or somebody will get hurt. Gen. Grant and btaff left last night on the W. II. Brown. Gen. McClernand and staff loft on the steamer Alps. Gen. Paine is in command here, and Col. Morgan, of the Tenth Illinois, remains in command at Bird's Point. Large reinforcements are expectcd here during to-day and to morrow.