"What’s the sense of asking me to be a production expert ? I wouldn't know enough.” 

"It ain't possible not to know enough to be a production expert," said Mr. Llewellyn, and was about to drive home this profound truth by adding that his wife's brother George was one when Monty, who had just looked at his watch, uttered a sharp cry and leaped from his seat. So absorbing had been the other's conversation that he had not remarked the passage of time. The hands of the watch stood perilously near the hour of ten. 

The Luck Of The Bodkins by Wodehouse, P. G. (CHAPTER XVIII )

https://archive.org/stream/in.ernet.dli.2015.126020/2015.126020.The-Luck-Of-The-Bodkins_djvu.txt