Choir participates in Elijah Members of the Chancel Choir will be singing in the chorus for the June 5 performance of Elijah by Felix Mendelssohn. The performance is at 8 pm at St. Mary's Cathedral, 1716 NW Davis Street. The Portland Chamber Orchestra, led by conductor Yaacov Bergman, will play. The chorus will include the Cantores in Ecclesia Treble Choir and the combined choirs of First Presbyterian and First United Methodist Churches.