Out of this came an aphorism: "A chimney's sweeper's boy could always make a fool out of every doctor in the university."

That's a great story. However, what is the significance of the Hebrew stamp? A hashgacha perhaps?
For illustrative purposes only. It's not as easy to find Hebrew-stamped cheese as you'd think (photo credit):

The passage is from Memoirs of a social monster; or, the history of Charles Price, Otherwise Bolingbroke, otherwise Johnson, otherwise Parks, otherwise Wigmore, otherwise Brank, otherwise Wilmott, otherwise Williams, otherwise Schutz, otherwise Trevors, otherwise Polton, otherwise Taylor, otherwise Powel, &c. &c. &c. and commonly called Old Patch. Containing an accurate account of the astonishing fraud and ingenious forgeries of that truly great man on the Governor and Company of the Bank of England for a Period of Fifty-Five Years. (London 1786)