The Apothecary was a resident of Camelot who sold beauty products such as eye drops for women. One of his frequent customers was the maid, Guinevere. Despite being unwilling at first, he had a key role in saving Gaius from  being burnt on the pyre when he was persuaded by Merlin and Gwen to reveal to the court that Aredian had forced him to sell the belladonna eye drops or he would have burnt him at the stake (The Witchfinder).
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