MR PRETORIUS
As you did not have any specific information in regard to a specific group of people that would attack Shell House, in other words you didn't have for the instance the time they would attack Shell House, the specific group that would attack Shell House etc.  The information you had was of a very general nature or that it could do as far as you as a commander is concerned is to put you on the alert that you must intensify the security and be on your alert so that the march is not used as a decoy for an attack?