27. U. S. steamer Brooklyn commenced the blockade of the Mississippi river.

27. Brig.-Gen. McDowell took command of the Federal forces in Virginia.

27. The blockade of Mobile, Ala., commenced.

28. Blockade of Savannah initiated by U. S. gunboat Union.

28. The rebels erected barricades at Harper’s Ferry and Point of Rocks; Manassas Junction fortified.

28. Strength of the Rebels in Virginia reported at 90,000 men.

28. Jeff. Davis arrived at Richmond.

28. Services of Miss D. L. Dix accepted by the War Department, for organizing military hospitals, and procuring nurses.

29. Advance of Ohio and Pennsylvania troops through Maryland, towards Harper’s Ferry; rebels fall back to Martinsburg.

29. Federal troops occupied Grafton, Va.