Would Hoofstrong then also know that the Royal Engineer had been inside the Rookery? The setup at the orchard shed was pretty covert, and it was run by a special unit of Military Ponice. But the pony in charge of the general air defense of Canterlot would probably know all about batpony operations in the area. She might even have a source of intelligence within the 'Royal Undermountain Constabulary' service.