About this recording 500–28 Stephen B. Bull UNKNOWN Alexander P. Butterfield May 18, 1971 Stephen B. Bull Unknown Alexander P. Butterfield Conversation No. 500-28 Date: May 18, 1971 Time: Unknown between 4:06 pm and 4:41 pm Location: Oval Office Stephen B. Bull and unknown people met. President's schedule Alexander P. Butterfield entered and the unknown people left at an unknown time after 4:06 pm. Unknown sound[?] President’s schedule Bull and Butterfield left at an unknown time before 4:45 pm. Secret White House Tapes | Richard M. Nixon Presidency 500–28 This recording is currently not available on millercenter.org. To listen to it, please email Mike Greco at mdg4u@virginia.edu Previous 3–57 Next 501–1 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 501–1 audio icon 501–10 audio icon 501–11 audio icon 501–12 audio icon 501–13 audio icon 501–14 audio icon 501–15 audio icon 501–16 audio icon 501–17 audio icon 501–18 audio icon