ten
o'clock
`` Show your repentance by making a fresh pot of coffee , as I have most of the first lot in my stocking , '' reminded Professor Zepplin . It seemed odd to be eating supper in broad daylight , whereas they ordinarily ate in the twilight or after dark . After supper , and when the remains were cleared away , the boys strolled about , talking . At ten o'clock the Professor called that it was time to turn in . `` But it is n't dark yet , '' protested Ned . `` The nights are short . Unless you turn in early you will not want to get up in the morning , '' reminded Professor Zepplin .