https://archive.is/JPleS#selection-989.0-1001.453
Nixon TIME CAPSULE
Where were we? Oh, yeah, the time capsule. In what appears to be a startling new twist, Merritt reveals to Liszt that he met three times with President Nixon in a "deep underground location beneath the White House. In the first, Nixon read him a letter stating that U.S. was protecting an extraterrestrial being and that scientists at Los Alamos were able to communicate with it and obtain "advanced technology and science."
Nixon then sealed the letter in a "time capsule" that he hid somewhere in the White House.
In another meeting, Merritt says Nixon told him to deliver a copy of the letter (which Nixon allegedly taped to Merritt's stomach) to National Security Advisor Henry Kissinger and not to tell anyone about it. Now, Merritt says co-author Douglas Caddy has notified the National Archive that Nixon's so-called time capsule is still in the White House and he (Caddy) will reveal the location if the National Archive agrees to read the letter to the public.