Isa ibn Ali al-Asadi dating history

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Abu ʾl-Rūḥ ʿĪsā ibn ʿAlī ibn Ḥassān al-Asadī (died 1262) was a Muslim writer. Ibn Manglī describes him as an expert on hunting who lived in the 6th century since the Hijra (1100s) under the Ayyubid dynasty. Between 1237 and 1242, after 23 years of traveling throughout the Islamic world, he wrote an encyclopaedia on falconry, al-Jamhara fī ʿulūm al-bayzara. It contains 578 chapters on hunting birds and other animals (hunting dogs, cheetahs) used in falconry; the history of falconry, including celebrated anecdotes; the health, training and veterinary care of birds; the legal and religious position of falconry in the Islamic world; and falconers' sayings and poems. It was at the time the most comprehensive work on hunting in Arabic.