How did Isaac Newton fight counterfeiting while working at the mint?

When Isaac Newton was appointed warden of the mint in 1696, he did not treat the position as a mere sinecure. Instead, he took an active role in the administration of the office, particularly during the great recoinage.1

Newton became deeply committed to the pursuit of counterfeiting. He applied himself rigorously to the task, becoming a formidable figure to those involved in the illegal production of currency. By actively investigating and pursuing these criminals, he was responsible for sending a significant number of counterfeiters to the gallows.1