In the later half of the 1960s, Fahey continued to issue material through Takoma as well as Vanguard Records, which had signed him along with similar instrumental folk guitarists Sandy Bull and Peter Walker. Albums from this period, such as "Days Have Gone By", "The Voice of the Turtle", "Requia", and "The Yellow Princess", found Fahey making sound collages from such elements as "gamelan" music, Tibetan chanting, animal and bird cries and singing bridges. In 1967, Fahey recorded with Texas psych-rock trio The Red Crayola at the 1967 Berkeley Folk Festival, music that resurfaced on the 1998 Drag City release "The Red Krayola: Live 1967". The Red Crayola subsequently recorded an entire studio album with Fahey, but the Red Crayola's label demanded possession of the tapes and recorded documentation of those sessions has been missing ever since.