[3] He was also given an arrangement co-credit for two traditional songs that appeared on Fifth Dimension: "Wild Mountain Thyme" and "John Riley" (although the latter is credited to Bob Gibson and songwriter/arranger Ricky Neff on the album itself).

[3] However, Clarke continued to honor his live concert commitments, appearing at a handful of shows during late August and early September 1967.

[5] Clarke returned from his self-imposed exile in time to contribute drums to the song "Artificial Energy" in early December 1967,[6] but was subsequently fired from the band by McGuinn and bass player Chris Hillman once The Notorious Byrd Brothers album was completed.

Clarke served with the Burritos between early 1969 and 1972, appearing with the band at the infamous Altamont Free Concert in California, headlined by The Rolling Stones, in December 1969.

[9] Many nightclubs simply shortened the billing to "The Byrds,"[9] and the pair soon found themselves involved in acrimonious court battles with Roger McGuinn, David Crosby, and Chris Hillman over use of the group's name.

The Byrds set aside their differences long enough to appear together at their induction into the Rock & Roll Hall of Fame in January 1991, where the original lineup played three songs together: "Mr. Tambourine Man", "Turn!

[12] During his final days, Clarke had expressed a wish to appear on television in the hope of alerting children to the dangers of alcoholism.

In 1994, a year after his death, Clarke's paintings were published in Dick Gautier and Jim McMullan's book, Musicians As Artists.