It is just a natural bastion such as a titanic Vauban might have designed in primeval times.

So far as the Castle is concerned, it is alone visible from the sea.

Any enemy approaching could see only that frowning wall of black rock, of vast height and perpendicular steepness.

Even the old fortifications which crown it are not built, but cut in the solid rock.

A long narrow creek of very deep water, walled in by high, steep cliffs, runs in behind the Castle, bending north and west, making safe and secret anchorage.