In the Meantime, Major Anderson Is Preparing Fort Sumter for an Attack

From the Official records, Series 1, Vol. 1.

APRIL 1, 1861:  Two 42-pdrs mounted, the terre-plein of two10-inch Columbiads elevated and two 32-pdrs. moved.  The loop hole openings on the first level were covered with large stones.  Two large splinter-proof traverses, one in front of the hospital and the other by the ordnance room, were built.

--Old B-R'er