Four o'clock in the afternoon
`` Good ! '' cried Nan . `` Let us go directly school is out , so as to have some good , long rides . '' Four o'clock in the afternoon found them at the lake shore . It was a cloudy day with a fair breeze blowing across the lake . `` Now you sit right there , '' said Bert , as he pointed to a seat in the back of the boat . `` And hold on tight or you 'll be thrown overboard . ''