On the morning of the recording session, January 19, 1957, Pepper's then-wife Diane informed him that she had secured an afternoon recording session with the Miles Davis rhythm section who were in Los Angeles appearing with Davis. Unhappily surprised and with a horn in bad need of repair, Pepper fixed an extra large amount of heroin and was off to the session. The music produced from this chaos has been described as "a diamond of recorded jazz history."
Source: All About Jazz
