About this recording 451–11 President Richard M. Nixon Alexander P. Butterfield February 18, 1971 Alexander P. Butterfield Richard M. Nixon Conversation No. 451-11 Date: February 18, 1971 Time: Unknown between 1:10 pm and 1:20 pm Location: Oval Office The President met with Alexander P. Butterfield Request Butterfield left at an unknown time before 1:20 pm Secret White House Tapes | Richard M. Nixon Presidency 451–11 Rewind 10 seconds Play/Pause Fast-forward 10 seconds 0:00 Download audio Previous 949–9 Next 47–1 More Richard M. Nixon Recordings View all Richard M. Nixon tapes 450–1 audio icon 47–1 audio icon 450–10 audio icon 450–11 audio icon 450–12 audio icon 450–13 audio icon 450–14 audio icon 450–15 audio icon 450–16 audio icon 450–17 audio icon