A dimness crept across the decks, and the sail shivered and filled again.

Bertric looked up at the sky and out to windward, and his face changed.
"What is it ?" asked Gerda anxiously.
"Running into a fog bank," he said.

"Look ahead." One could not see it.

Only it was as if the ring of sea to windward had of a sudden grown smaller.

Heidrek was not a mile astern of us, and still his ships were in bright sunshine.