Toxicology and Pharmacy: In the field of toxicology an early manual was Kitab as-Sumum attributed to Shanaq the Indian and translated into Arabic by al-’Abbas bin Sa’id al-Jawhari for the Caliph al-Mamun (r.813-833). The text discusses poisons and how they can be detected by sight, touch, taste, or by the toxic symptoms which they cause. Descriptions are given of poisoned drinks, foods, clothes, carpets, beds, skin lotions, and eye salves, as well as narcotics and universal antidotes. Kings were said to guard the book, keeping it in their treasure cabinets, hidden from their children and friends.