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By the King's patent : His Majesty having been graciously pleased to grant his royal letters patents, bearing date at Westminster, the 17th day of October 1751, in the 25th year of his reign, unto Richard Rock, of the parish of St. Bridget, otherwise Bride's, London, licentiate in medicine, for his new compound medicine, or anti-venereal cathartick electuary, for the true cure of fresh venereal injuries ... at the same place may be had, Viper Drops ...

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