This one, the one of the title, was situated in Spain.

That much I discovered only from internal evidence, because a good many pages of that relation were missing--perhaps not a great misfortune after all.

The writer seemed to have entered into a most elaborate detail of the why and wherefore of his presence on that coast--presumably the north coast of Spain.

His experience has nothing to do with the sea, though.

As far as I can make it out, he was an officer on board a sloop-of-war.