She told her father about it the next day. The news surprised him. Though he accepted the fact of intercepted mail, tapped telephones and telegraph lines, and the likelihood of eavesdropping at the chancery, he never would have imagined a government so brazen as to place microphones in a diplomat’s private residence. He took it seriously, however. By now he had seen enough unexpected behavior from Hitler and his underlings to show him that anything was possible. He filled a cardboard box with cotton, Martha recalled, and used it to cover his own telephone whenever a conversation in the library
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