one o'clock
`` It cost me many thousands of dollars , '' he cried . `` It is time for lunch , Professor , '' said Betty . Marable bowed to Leffler and left the millionaire sputtering away , inspecting the various specimens he had contributed . The one o'clock gong had struck , and all the workers and investigators were leaving in paleontological laboratories for a bite to eat . * * * * * Marable , with Betty , went out last . Leffler was over in one corner of the room , hidden from their sight by a corner of an amber block . They could hear Leffler still uttering complaints about the carelessness of the men in charge of that section of the museum , and Marable smiled at Betty sadly .