As Bakir Meeram says, the distance is not great.

The walls themselves, with the exception of those of the two forts, are not more than half a mile in extent; for in most places the rocks go sheer down, and there defences are, of course, unnecessary.

We will inspect this fort, first." They went the round of the walls, Dick and his companion listening to the suggestions of the two officers.

The principal one was that a wall should be raised, inside the gate.
"The English, last time, got in here by rushing in at the tail of the fugitives from below.

They were in before the gates could be closed, and took our men so completely by surprise that they were seized with a panic.