The ‘Professor’ knew too much. How did he prove himself? Fill up the space with suitable examples from the story, using the given clues: (a) about muzzle velocity: ____________________________________________ ________________________________________________________________ (b) after a thirty mile walk: ____________________________________________ ________________________________________________________________ (c) his salute on payday: ____________________________________________ ________________________________________________________________ (d) the loud sound of a high flying invisible aeroplane: _______________________ _________________________________________________________________ (e) about hand grenades: _____________________________________________ ________________________________________________________________ (f) during cookhouse duties: _____________________________________________ ________________________________________________________________