Photo: SummerKeys’ next concert will feature Bruce Potterton, the founder and director of the SummerKeys music vacation program which takes place every summer in Lubec. All concerts are free, and are held at the Congregational Christian Church in Lubec.  Submitted photo

The Mary Potterton Memorial Concert scheduled for Wednesday, June 28, features Mr. Bruce Potterton, the founder and director of “SummerKeys, a Music Vacation” – an annual summer immersion music program that serves adults from all over the world, and which is held in Lubec.