Real-Time Improvisation by David K. Barton, recorded May 5, 2021, PLATO’s PilotHouse, Michiana. PLATO, No. 1179a, “Megalith 5, part 1” 11:36-24:36; with, PLATO, No. 1179b, “Megalith 5, part 2” 00:11-13:11 (both: David, & Boyd Nutting, 7/9/02).