6:30
The detective nodded . `` How can they help us ? '' `` Somewhere on this stretch of the street railroad you will probably find the stand of the cab we are looking for . The man who hired it evidently arrived on the 6:30 train at the West Station -- I have reason to believe that he does not live here , -- and then took the street car to this corner . The last ticket is marked for yesterday . In the car he probably made his plans to hire a cab . So you had better stay along the line of the car tracks .