It is just where the boat turned and came out again." "I can see no signs of it now," the captain said, examining the shore with his telescope.
"No, sir; you wouldn't until you were within a hundred yards of it.
But rowing close in as we were we saw it some time before we got there.

The rocks overlap each other, and there is a narrow channel some fifty yards long between them.

Apparently this makes a sharp turn at the other end and opens out.

We saw nothing of the vessels we were chasing yesterday, but on high ground facing the channel there is a battery of six guns planted so as to rake anything coming in.

There are some chains across the end.