From the Washington Post, part one of a story by Woodward on the origin of Deep Throat (you may have to register):
Deep Throat .
Excerpt:
"In 1970, when I was serving as a lieutenant in the U.S. Navy and assigned to Adm. Thomas H. Moorer, the chief of naval operations, I sometimes acted as a courier, taking documents to the White House. One evening I was dispatched with a package to the lower level of the West Wing of the White House, where there was a little waiting area near the Situation Room. It could be a long wait for the right person to come out and sign for the material, sometimes an hour or more, and after I had been waiting for a while a tall man with perfectly combed gray hair came in and sat down near me. His suit was dark, his shirt white and his necktie subdued. He was probably 25 to 30 years older than I and was carrying what looked like a file case or briefcase. He was very distinguished-looking and had a studied air of confidence, the posture and calm of someone used to giving orders and having them obeyed instantly."