6:42
`` Perhaps they missed the train and will catch the next , '' I hazarded . `` The fog in London is quite exceptional , the guard said . I have given orders for the coachman to return and try for the next train . It gets in at 6:42 . After that there is one at 7 , and the last one is at 10:18 . But they will probably telegraph . '' `` It makes me laugh , '' I said .