as-Suyuti is presently recognized as the most prolific author in the whole of Islamic literature (E. Geoffroy in Encyclopedia of Islam v. 9, 1991:913-916). He was widely read and famous across the Islamic world during his lifetime and was known for extreme self-confidence in his mental abilities (e.g. he had memorized 200,000 hadiths and was a polymath) which mingled with arrogance and created acrimonious relations inside Egypt (E. Geoffroy in Encyclopedia of Islam v. 9, 1991:913-916). E. Geoffroy in Encyclopedia of Islam v. 9 (1991:913-916) describes his procedure as scientific in so far as he quotes his sources with precision and presents them in a critical way and states that he cannot be considered as a mere compiler. He may have authored close to a thousand books writing on many subjects (e.g., History, Biography) besides religion and Islamic jurisprudence. as-Suyuti was born in Egypt in 1445 CE and at the age of eighteen taught Shafi'i law at the mosque of Shaykhu and gave juridicial consultations. In 1472 CE, he became a teacher of hadith at the same mosque. In 1486 CE at the age of 40, as-Suyuti retired from public life. By 1501 CE, he had completely isolated himself in his home on Rawda Island in Cairo where he worked on the editing and revision of his literary works. He died there in 1505 CE (E. Geoffroy in Encyclopedia of Islam v. 9, 1991:913-916). His book Clearing up the Description of Earthquakes is a valuable reference for historical earthquakes and is one of the earliest extant earthquake catalogs.