According to High Treason: The Assassination of President John F. Kennedy--What Really Happened? by Robert J. Groden and Harrison Edward Livingston, "Penn Jones, Jr. claims that Hoover and Nixon were at" multi-millionaire Clint "Murchison's house" in Dallas on "the night before the assassination" for "a meeting."
And according to The Day Kennedy Was Shot by Jim Bishop, during the afternoon of November 22, 1963, "Richard Nixon reached his home in New York and dialed J. Edgar Hoover," a few hours before Lyndon Johnson got around to telephoning J.Edgar Hoover.
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