"Quite sure."
"Think again, my man," said Frank.
"Look here," said Cutlip, "do you mean to insinuate that I'm lying?"
"I don't insinuate anything. I know you are lying. Hold up there!"
For Cutlip had taken a threatening step forward.
"A party of three German sailors from a submarine nearby were seen to come this way," Frank went on. "You must have seen them. Now, if you are not trying to shield them, tell me where they are."
"I don't know. I haven't seen them."
"Call a couple of men, Lieutenant," said Frank to Hetherton.
Hetherton raised a hand, and two sailors came forward.
"Once more," said Frank to Cutlip, "will you tell me what you know of those men?"