Early scribes translated works of numerous well-known individuals (such as Plato, Hippocrates, and Avicenna) as well as reproduced a "twenty-eight volume Arabic language dictionary called "The Mukham", written by an Andalusian scholar in the mid-eleventh century." Original books from Timbuktu have been written by local scientists, historians, philosophers, and versemakers. Legal experts in the city gathered numerous amounts of scholarship about Islamic jurisprudence, or "fikh", as well as obligatory alms, or "zakat." Astronomers studied the movement of stars and relation to seasons, crafting charts of the heavens and precise diagrams of orbits of the other planets based on complex mathematical calculations; they even documented a meteor shower in 1593—"“In the year 991 in God’s month of Rajab the Godly, after half the night had passed stars flew around as if fire had been kindled in the whole sky—east, west, north and south...It became a nightly flame lighting up the earth, and people were extremely disturbed. It continued until after dawn.” Physicians documented instructions on nutrition and therapeutic properties of desert plants, and ethicists debated matters such as "polygamy, moneylending, and slavery." "There were catalogues of spells and incantations; astrology; fortune-telling; black magic; necromancy, or communication with the dead by summoning their spirits to discover hidden knowledge; geomancy, or divining markings on the ground made from tossed rocks, dirt, or sand; hydromancy, reading the future from the ripples made from a stone cast into a pool of water; and other occult subjects..." A volume titled "Advising Men on Sexual Engagement with Their Women" acted as a guide on aphrodasiacs and infertility remedies, as well as offering advice on "winning back" their wives. "At a time when women’s sexuality was barely acknowledged in the West, the manuscript, a kind of Baedeker to orgasm, offered tips for maximizing sexual pleasure on both sides."