eight o'clock
He had gone in front of them , in an aeroplane . After that , they telephoned to me again from Le Mans , where they had been searching a deserted coach-house . `` You may be sure that the search had already been made by Lupin , and that we shall know the results . Listen : eight o'clock ! '' At the same moment they heard the throbbing of a motor car . It stopped outside the house ; and the bell rang almost immediately after . Orders had been given beforehand .