Asking Van to stop his affair with Ada, Demon Veen (in VN's novel Ada, 1969, Van's and Ada's father) says that he will tell Van about the Black Miller some other time:
A longish pause not unlike a fellow actor’s dry-up, came in response to his well-rehearsed speech.
Finally, Demon: ‘The second fact may horrify you even more than the first. I know it caused me much deeper worry — moral of course, not monetary — than Ada’s case — of which eventually her mother informed Cousin Dan, so that, in a sense —’
Pause, with an underground trickle.