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-> 1643. original: "∞. IƆ C. XLIII." An early modern way of printing the date using Roman numerals where the lemniscate (∞) and the "I" followed by a reversed "C" (IƆ) represent 1000 and 500 respectively.
-> With Approval and Privilege. This indicates the book had the official permission of the censors and a "privilege," which acted as an early form of copyright protection.