https://www.onstageblog.com/editorals/2020/3/21/questions-and-outrage-mount-towards-brown-paper-tickets-over-money-payment-issues?fbclid=IwAR3NjMGNZbWxZmubB5sLFppsod0fBHQ8S17XXnffG1pIoNbm4hiaTIBIGjg
"Noel [Coward] and I were in Paris once. Adjoining rooms, of course. One night, I felt mischievous, so I knocked on Noel's door, and he asked, 'Who is it?' I lowered my voice and said 'Hotel detective. Have you got a gentleman in your room?' He answered, 'Just a minute, I'll ask him.'" (Beatrice Lillie)