The Myst came from Philadelphia PA and cut this one single for release on Open Records 1252 in September, 1969. The A-side was a Gary Usher- Roger Val Christian song, “Coney Island Wild Child” which had been cut by Billy Harner for Lawn back in 1964. It could sound dated but the singer has a rushed, off-hand attitude that suits the song.
Following the Myst single, Open Records released three singles and an LP by Billy Harner, and I believe the Myst was backing Harner in live appearances at this time.
“I’m Crying” is a heavy guitar and Hammond rocker, with a good lead vocal and sustained guitar running continuously throughout the song. The song was written by Joe Siderio, who may have been a member of the group, published by Caldwell Music, BMI.
I don’t know anything else about the Myst or who was in the group.