Sunday May 8 (Mothers Day) 12 noon AN AMPHITHEATRE OF HILLS 1 Concert 1 THREE REQUIEMS – Mugga Mugga Quarry Peter Sculthorpe Requiem *premiere of Organ version Canberra Choral Society, DRUMatiX Percussion Group , William Barton didjeridu and Calvin Bowman electric organ directed Brett Weymark.