What herbs were used in the plague doctors mask?

The plague doctor's mask, also known as a beaked mask, was designed in the 17th century to protect the wearer from contagious diseases, particularly the bubonic plague. While the mask had an intimidating appearance, its efficacy in preventing the spread of disease is questionable. Rather than herbs, the beak was typically used to store aromatic substances such as camphor, mint, and cloves. These substances were believed to ward off the bad air and the plague.