Sam laughed quietly.
"That's an alibi that might do nicely for both of us," he commented. "Much obliged. Did he mention my name?"
"He knows that you are called Sam," said Rosalind shortly.
"I see. Quite a chap, isn't he, don't you know?"
The voice of the boatman was rather satirical.
"And I'll tell you something else," she continued. "Mr. Davidson is convinced there is some queer work going on here, and he mentioned a boat hailing him last night while he was out in his yacht."
"So you've found out it was Davidson's yacht, then?"
"I have."
Sam seemed to find cause for gentle mirth.
"I think I can now understand," she added, "why you refused to let him help us. Even a burglar may have a certain delicacy about accepting a favor from his intended victim."