I'd read this on the first page of the only Irving Wallace novel i've ever read, The Seven Minutes. I just love the way its put.
For your reading pleasure (reproduced in my own words since I dont remember the original beginning):
'Doctor,' the two old ladies said 'we admire the work you've put into compiling this dictionary. It covers a vast range of words. We were also happy to see that you havent included any obscene words,doctor'
The doctor smiled kindly and said
'Have you been looking for them, my dears?'