For those George Harrison completists among us there are a couple of new rare tracks to be aware of.

Bob Dylan is about to release another volume in his continuing Bootleg Series, and it contains two songs where Harrison makes an appearance.

The Bootleg Series, Vol. 10 – Another Self Portrait (1969-1971) comes out on August 27 and the trailer for the compilation (below) says it features unheard collaborations between Dylan and Harrison:

Rolling Stone says the two songs, “Time Passes Slowly” and “Working on a Guru,” come from Dylan’s one-day session in New York with George in May, 1970. “Most of the songs from that day suck,” says a quoted source. “The story we heard from the engineer is that they were just messing around as they waited for Elvis, and Elvis never showed up. They were just treading water. But these two songs are very nice.”

The Harrison session marked the first day of recording for the Dylan album which followed Self Portrait called New Morning.

The Bootleg Series, Vol. 10 – Another Self Portrait (1969-1971) will be released as a 2CD Standard Edition, a 3LP Standard Edition, and a 4CD Deluxe Edition: