Prof was distressed, Wyoh was worried. I said, "Damp it! Nobody but me knows retrieval signal. Wyoh, you know how Mike behaved about your pictures; won’t let me have those pictures even though I suggested lock on them. But if you two will stop oscillating, I’ll call him, make sure that nobody has retrieved that recording. and tell him to erase—then it’s gone forever, computer memory is all or nothing. Or can go one better. Call Mike and have him play record back into recorder, wiping storage. No huhu."