By Nigel A. Campbell The rain in Ottawa didn’t fall so much as it drifted, a cold, gray mist that clung to the Gothic limestone of Parliament Hill like a shroud. Inside the high-walled compound of the British High Commission on Elgin Street, Arthur Pendelton adjusted his spectacles and stared at a secure, air-gapped terminal. The building was quiet, save for the hum of defensive server stacks and the occasional muffled footstep of marine guards patrolling the corridor. Pendel