MAY 28TH, 1861: USS Union, Commander John R. Goldsborough, initiated blockade of Savannah.
MAY 29TH, 1861: Confederate privateer J.C. Calhoun, captured American brig Panama, which she took to New Orleans with two earlier prizes, American schooners Mermaid and John Adams. That probably caused a bit of a stir when the ships passed the USS Brooklyn.
** USS Powhatan, Lt. D.D. Porter, captured schooner Mary Clinton attempting to run the blockade near Southwest Pass, Mississippi River. Evidently, when you set a blockade of a port, you can seize incoming ships right away.