"I've stopped," assented Darry, smilingly, as he stepped back.
"Do you realize what you have done, scoundrelly Yankee?" hissed the ober-lieutenant, also rising and drawing his revolver.
"Of course I do," Dave smilingly assented.
"You have jammed the periscope. But at least we can dive when we need, for—there!"
With deft manipulation of a small device the German commander added:
"I have closed the valves of the 'scope, which will now admit no water if we dive. You did not succeed, Herr Darrin. But you will draw upon us the Yankee fire if yonder commander is now able to sight our scope."
As if to verify the statement a muffled sound came to them through the water. Glancing down swiftly at the table von Schellen saw that reflected which caused him to exclaim:
"The Yankee destroyer has opened upon us with her forward port gun. And there goes the starboard gun!"
Von Schellen, at a nod from his chief, signalled the orders for diving. The ober-lieutenant saw the "Reed," as pictured on the white table, come steaming toward the submarine at full speed.
"You idiot!" raged the German commander. "Your treachery has betrayed us, and now the Yankee will do his best to sink us and drown all on board here."