Then finally a step was heard on the gangplank. Lieutenant Cantor
came briskly up over the side, halting on the deck and saluting
toward the stern, where the colors flew until sundown.

"Mr. Darrin, I've come on board," reported the lieutenant, turning
in time to catch Dave's salute.

He stepped closer, to add:

"You will enter a note that I came on board at 10.58."

"The time is eleven-forty, sir," Dave reminded his superior, at
the same time displaying his watch.

"Note that I came on board at 10.58," insisted Cantor, frowning.

"Sentry!" called Dave, briskly.

"Aye, aye, sir!"

"Note the time on the chronometer inside," Darrin ordered.

"Aye, aye, sir." Then, returning the marine sentry answered:

"It's eleven-forty, sir."

Dave made the entry of the lieutenant's return.

"You infernal trouble-maker," hissed Cantor, as the sentry paced
on. "You dragged that sentry into it, just so you would have