... Prussia, was formerly on the steamer Isabel, running between Havana, Key West, and Charleston; he testifies that the Isabel is being transformed into a gunboat; she is nearly ready for her armament; Captain Rollins , the former captain, will command the Isabel; John Cameron, seaman, aged thirty-two years, a native of Scotland, was on the Jeff. Davis when she captured the barks Alvarado, Enchantress, and schoon...