This PDF file contains a series of internal White House memos, and correspondence between the Department of Transportation and the White House, from January-March 1970 on the subject of DOT’s “Railpax” proposal that would, later that year, become Amtrak.
(The handwritten notes in green ink are those of Pat Moynihan.)
Original documents are in the Nixon Library, in the files of Daniel Patrick Moynihan (box 35), Egil “Bud” Krogh (box 36), Ken Cole (box 6), and in White House Central Files series TN4, box 6.