I just bought the original 1972 Greatest Hits of Simon & Garfunkel after realizing that after purchasing the Old Friends box set, The Columbia Studio Recordings 1964-1970 box set, The Graduate Soundtrack, Live From New York City, 1967 and Concert In Central Park, that I was still missing the previously unissued alternate take of "America" and live versions of "For Emily, Whenever I May Find Her," "Homeward Bound," "Feelin' Groovy," and "Kathy's Song,". Which leads me to the question; where did these live versions come from? The CD, which sounds pretty awful, also has absolutely no liner notes! The Paul Simon Box Set, 1964/1993, reads that the live version of Kathy's Song contained therein which it noted was from "Greatest Hits" was "recorded live in New York, 1968". None of the other live tracks from the Old Friends box set seem to be from this location and date and I'm wondering if anyone knows where they are from, and are all 4 live songs from the same source?