During the period of their Khalifate there were not only male, but also some female poets. All their poems are mostly short, and confined to amatory, laudatory, or vituperative compositions, called forth by the momentary circumstances in which the authors happened to be placed. These pieces do not represent either deep thought or profound wisdom, but they show the feelings of the people, and their state of civilization at the time in question. During this Khalifate were also produced the earliest germs of stylistics, epistolography and mysticism, all of which were more fully developed under the Abbasides. The originator of the first two was the Katib Abd Al-Hamid, secretary to the last Omaiyide Khalif, and he is designated in an old Arabic rhyme as 'the father of all secretaries.' Epistolary writing, it was said, began with Abd Al-Hamid, and finished with Ibn Al-Amid. As regards mysticism, the origin of its doctrines is sometimes assigned to Oweis Al-Kareni, the Prophet's companion, who disappeared mysteriously in A.D. 658. But mysticism and Sufism were subsequently much developed by Muhi-uddin Muhammad, surnamed Ibn Al-Arabi, a most voluminous writer on these subjects. He was born at Murcia, in Spain, A.D. 1165, and after studying in that country, went to the East, made the pilgrimage, visited Cairo and other cities, and died at Damascus A.D. 1240. He is the author of many works, but the most remarkable of them are 'Revelations obtained at Mecca' and 'Maxims of Wisdom set as Jewels.' Both Makkari the historian, and Von Hammer Purgstall, in his history of Arabian literature from the earliest times, give a long account of him. Of the Khalifs of the house of Abbas, the second, third, fifth and seventh, viz., Al-Mansur (A.D. 754-775), Al-Mahdi (A.D. 775-785), Harun-ar-Rashid (A.D. 786-809), and Al-Mamun (A.D. 812-833) were the most distinguished as patrons of art, science and literature. But after the translation of the 'Arabian Nights' into European languages, the name of Harun-ar-Rashid became the best known in Europe as the representative of the most brilliant period of the Eastern Khalifate, and as the great protector of Arabic literature.