P. T. Barnum,
The Humbugs of the World — Chapter XLI
(1866)
“ Everybody at Paris knew about the Diamond Necklace, and about de Rohan’s desire to get into court favor. This sharp-witted female swindler now came in among the elements I have thus far been describing, to frame necklace, jeweller, cardinal, queen, and swindler, all together into her plot, just as the key-stone drops into an arch and locks it up tight.No mortal knows where ideas come from. ”
