...others are forming. Mobile has 4,500 fighting men. We have about 1,000 in the field, and the balance are ready to march. About 5 o'clock, the Guards moved from the armory, and marched up Royal to Dauphin , and down Dauphin to the steamer Selma, on board of which boat they took passage to Montgomery.--New Orleans Picayune, April 28. General Harney, on his way to Washington, was arrested by the Vi...