The Zug began to forge through the placid water, increasing speed as she passed through the gap in the reef.

Von Giespert turned to the quartermaster.

"Ost zu sud," he ordered.

That course, east by south, was the course for Nua Leha.

CHAPTER XXXI

Exit the "Zug"

"What's that made fast to the shot-line, old man?" inquired Beverley, as Villiers, divested of his helmet and diving-dress, sat in the stern-sheets of the boat that von Giespert had unwittingly given over to the Titania's people.

"That?" replied Villiers. "I dunno. Ballast, I expect. There are tons of it down there. Wonder if it's lead?"

"If so, it's a fortune for anyone who can get it back to England," observed Harborough, unclasping his knife and digging the point into the block of metal.