The Fall of a US President: HOW WOODWARD MET DEEP THROAT ; the Naming This Week of Mark Felt as the Senior FBI Source in the Watergate Affair Has Ended a 30-Year Mystery. Now the Journalist to Whom Felt Supplied Information Has Described His Very First Encounter with the Man Who Was to Become His Anonymous Contact

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Marilyn Davis has been parking in the underground car park at 1300 Wilson Boulevard in Rosslyn for the past three years but she had no idea of the building's role as a footnote to journalistic history. Yesterday morning, informed by The Independent that the low- ceilinged parking lot was apparently where the Washington Post reporter Bob Woodward met his famous source Deep Throat to obtain information that would bring down a US president, Ms Davis did not appear especially overwhelmed.

'I had no idea,' she smiled, as she stepped out of her car. 'But it's certainly a conversation piece. I'll mention it to the others in the office.'

Those mysterious, late-night …