“Take a look out the window and see if Hanleigh is snooping around the rocks,” advised Biff.

Chet sped to the window.

“A glorious day!” he reported. “A beautiful, sunshiny Christmas day. The only cloud on the whole horizon is that there is no sign of Mr. Hanleigh. The ice is clear and it looks as if we’ll have some splendid ice-boating this afternoon. But Mr. Hanleigh is not ice-boating this morning. There is snow on the hillside—but our dear friend Hanleigh is not snow-shoeing. But let us not lose hope. He may yet emerge from his hiding place and proceed forth to enjoy the keen Christmas air in the vicinity of Cabin Island, that clear atmosphere that he doesn’t want us to breathe.”

Chet’s rhapsody came to an abrupt halt when Joe hurled a wet towel that caught him squarely on the back of the neck. Frank, who had been appointed cook for the day, put a stop to hostilities by announcing breakfast just then and the lads sat down to piping hot plates of ham and eggs, accompanied by fragrant coffee.

The big surprise came when Frank, with a flourish, drew aside a curtain that had been screening a mysterious table in one corner of the big room. Here, the Hardy boys had put their presents to each other and to their chums. There was a handsome pair of boxing gloves for Biff and a glittering, nickel-plated flashlight for Chet. Frank had given his brother a new watch-chain and Joe, in turn, had given Frank a pair of cuff-links with his initials engraved thereon.

“Well,” said Chet, admiring the flashlight and switching it on and off to see that it was in good working order, after the boys had exchanged thanks for the gifts, “Biff and I thought we were putting something across, too, but you got ahead of us.”

And, going into the kitchen, he emerged with some mysterious-looking parcels which he promptly distributed. These were the presents Biff and Chet had arranged to give the Hardy boys and to each other. Frank received a pair of ski-boots and Joe the same. Biff’s enthusiasm over a punching bag was long and loud, while Chet himself was delighted with a little book of tickets to the best motion picture house in Bayport.

“I see where I won’t do much homework until these tickets are used up,” he said, with a wink.

Their presents having been duly examined and admired, the lads donned their outing clothes, with the exception of Frank. As cook, it was his duty to stay and prepare the Christmas dinner, at the same time keeping an eye on the rocks where the supplies had been hidden. The base of the cliff was in plain view of the big cabin window so there was little danger that the owner of the mysterious notebook would approach unobserved.

“What if he should chance along while you’re all away?”