seven o'clock
At eleven o'clock they switched off the electric chandelier . Don Luis and Weber hardly slept at all . The night passed without incident of any kind . But , at seven o'clock , when the shutters were opened , they saw that there was a letter on the table . Just as on the last occasion , there was a letter on the table ! When the first moment of stupefaction was over , the deputy chief took the letter . His orders were not to read it and not to let any one else read it .