[6] According to Slocum, these tapes included early versions of "Eight Miles High" and "Why" that had been recorded at RCA Studios in late 1965, along with the outtakes "Triad" and "The Day Walk (Never Before)".

[3] Hyde retained Dickson's help in the project as a way of ensuring that the album would have the blessing of the ex-members of the Byrds and, in some cases, their active participation in enhancing the material.

[3] Following the initial discovery at Wally Heider Studios, a thorough search of the Columbia Records' tape vaults ensued and additional unreleased material dating from the mid-1960s was unearthed.

[4][5] Two of Crosby's compositions on the album benefitted from the addition of newly recorded overdubs, performed by ex-members of the Byrds, in an attempt to polish the material further.

[3] "It Happens Each Day", an outtake from the Younger Than Yesterday sessions, had been abandoned in an incomplete state during the 1960s and, as a result, it required further instrumental embellishment to prepare it for release.

[8] Crosby's controversial ode to a potential ménage à trois, "Triad", also required additional work, after a problem with the lead vocal track was discovered.

[10][12] In later years, both McGuinn and Crosby expressed a preference towards the original RCA version of "Eight Miles High" over the more famous Columbia recording, with both band members feeling that it was more spontaneous sounding.

[11] The album also included what critic Richie Unterberger has called "a rough but endearing" cover of Bob Dylan's "It's All Over Now, Baby Blue", which had initially been recorded as a potential third single for the band, during sessions for the Turn!

[5] The band's debut single, "Mr. Tambourine Man", and its B-side, "I Knew I'd Want You", both received a new stereo remix, as did Crosby's song, "Lady Friend".

[3] The first of these was a new stereo remix of "Have You Seen Her Face", which appeared on The Byrds box set in 1990, and the second was a version of "Old John Robertson" featuring newly recorded mandolin overdubs.

[4] Two tracks that have not appeared on any other release, however, are the stereo remix of "Lady Friend", featuring newly recorded drumming, and The Notorious Byrd Brothers outtake, "Flight 713".