" you’ll have to ask Fiona.’ ‘Did you get the information by some other means? I’m determined to press this point, Giles. You may as well come clean.’ ‘Because your pal Werner Volkmann did it? And you’d like to clear him?’ ‘How did Werner get into Operations that night? He’s never worked in Operations. He’s always been a street man.’ ‘Werner Volkmann wasn’t up there. He was Signals Security One. He brought it from Signals to Ciphers "

― Len Deighton , Berlin Game (Bernard Samson, #1)