Geoffrey Shugen Arnold, Roshi - Zen Mountain Monastery, New York, Sunday Morning 08/01/2021 - From The Book of Serenity, Case 19 - Ummon's Mount Sumeru - Apologies for the microphone problem during the first 10 seconds obscuring Shugen Roshi's voice for the first sentence of the koan: "The pointer: I always admire the novel devices of Master Ummon."