Never-released concert recordings from 1968 which include performances by Neil Young, Joni Mitchell and Tim Buckley have resurfaced after being discovered six years ago and subsequently ‘lost’ again.

The professional recordings, made at the University of Michigan’s Canterbury House, have been acquired by the Michigan History Project. The non-profit organization is now looking for a label that might be interested in releasing them.

“We learned of the existence of the tapes about six years ago,” said Michigan History Project president Alan Glenn in a statement. “They were in the possession of a private collector. Then they disappeared, and we were afraid they were gone for good. But a few weeks ago they resurfaced, much to our surprise and relief. Now our first priority will be to get them transferred to a digital format, then make sure that the original analog tapes are safely archived.”

Canterbury House was a hot spot followers of the 1960’s counterculture, hosting acts such as Frank Zappa and the Mothers of Invention, The Byrds, Janis Joplin and more. Neil Young’s performances at the venue on November 9th and 10th of 1968 were previously featured on Sugar Mountain – Live at Canterbury House 1968.