This experience happened in February of 1973. I had returned from India the end of the previous December.
I was trying to carry on with the routine Swamiji had suggested for me, and was doing my asanas in the room that had been his when he stayed with us. I had completed the asanas and was sitting for meditation when I clearly heard the haunting sound of a flute. The beguiling sound was loud enough to be very close by. I knew that there was no one playing a flute in my house, and wondered if it was coming from next door, although that did not seem likely. The sound did not continue and so it remained a mystery. A few days later the incident with Priscilla occurred. Only then did I realize that it was indeed Lord Krishna who had played his flute for me.