These letters were sent from or received by David Piff (currently archivist at the Bahá'í World Center) in 1984 in an attempt to find and acquire copies of materials contained in the presidential libraries of Hoover, Roosevelt, Truman, Eisenhower, Kennedy, Johnson, Nixon, and Ford. Following is some ephemera also from the Piff collection. All letters scanned by Robert Stauffer and posted online with permission of Piff.

1. From Piff to the library of Herbert C. Hoover
2. From the library of Herbert C. Hoover to Piff
3. From Piff to the library of Franklin Delano Roosevelt
4. From the library of Franklin Delano Roosevelt to Piff, page 1
5. From the library of Franklin Delano Roosevelt to Piff, page 2
6. From Piff to the library of Harry S. Truman
7. From the library of Harry S. Truman to Piff
8. From Piff to the library of Dwight D. Eisenhower (not available)
9. From the library of Dwight D. Eisenhower to Piff
10. From Piff to the library of John F. Kennedy
11. From the library of John F. Kennedy to Piff
12. From Piff to the library of Lyndon B. Johnson
13. From the library of Lyndon B. Johnson to Piff, page 1
14. From the library of Lyndon B. Johnson to Piff, page 2
15. From Piff to the library of Richard M. Nixon
16. From the library of Richard M. Nixon to Piff
17. From Piff to the library of Gerald R. Ford
18. From the library of Gerald R. Ford to Piff

1. From the US NSA, to ?, no date
2. From the office of JFK to the US NSA, 08/05/1963
3. From the BIC to the office of LBJ, 03/04/1965
4. From the office of LBJ to the US NSA, 06/28/1965
5. the office of LBJ to the US NSA, 10/06/1967
6. From the office of LBJ to the US NSA, 10/13/1967
7. From a Presbyterian Church to the office of LBJ, 12/20/1967
8. From the US NSA to the office of LBJ, 07/26/1968
9. From the US NSA to the office of LBJ, 07/26/1968
10. From the office of LBJ to the US NSA, 08/08/1968