Boarding school art November 30, 2019 RWhitcomb-editor Kelly McGahie, “Star Lake’’ (digital photograph), by Kelly McGahie, in the show “Hidden Treasures 5,’’ at Phillips Exeter Academy’s Lamont Gallery through Dec. 14.This exhibit features the work of Phillips Exeter Academy employees, faculty and students across departments. The pieces span media as well, including stained glass, watercolor, photography, fiber arts and more. The artists use their different media to reflect on exploration, expression and the role of the arts at the famous boarding school in Exeter, N.H. Water Street in downtown Exeter, an affluent town founded in 1638 and named after a town in Devon, England.