But the excitement was not complete, for, gathering strength now, and recovering from the shock I had received, I was watching the pirates scrambling over the ridge in haste, as if pursued, when there was a concussion of the air, a heavy boom, and I saw the _Teaser_ come into sight, passing through the channel south of where we stood.  Then there was a quick puff of smoke, another heavy boom, and I saw that she was going full speed, leaving a black stream of smoke behind her, in chase of the two junks, one of which was about a quarter of a mile away, the other about a mile farther.