ten o'clock
These had been hidden in a cleverly concealed artificial , sod-covered cave in the woods . Its existence had been so well hidden that Camp Wau-Wau girls had scores of times passed over the cave without suspecting its existence . Before the revenue cutter sailed away the six officers aboard came ashore one evening , taking dinner with the girls , in company with a number of young men , invited from the neighborhood . Afterward until half-past ten o'clock there was a pleasant dance . All too soon Harriet Burrell and her friends found this vacation trip at an end . Proud of the honors they had won , delighted beyond words with the good times they had had , they left for home the day before the hulk of the `` Sister Sue '' was taken away , at Mr. McCarthy 's order , and sold . `` We are leaving behind us the best time we have ever had , '' sighed Hazel on the morning of their departure .