two o'clock
* * * One evening at the hour of twilight , messengers passed rapidly among the Japanese distributing maps and orders to prepare for flight . Late that night , their possessions made ready for flight , Komoru and Ethel sat with Professor and Madame Oshima beneath the latter 's plane . `` Our scouts have come to the conclusion , '' said Oshima , `` that a cavalry attack is to be expected in the early morning . So our plan is for a signal plane to rise at two o'clock directly over the center of our territory . It will carry a bright yellow light . Beginning with the outlying groups our forces are to fly toward the light , rising as they go . Attaining an altitude of two miles they are thence to fly due north as our maps show .