revealed in two hours in response to a question by Governor Manouchehr Khan Gorji. It discusses the special prophethood of Muhammad, an important subject discussed in debates between Muslims and Christians. Tafsír-i-Súrih-i-va'l-ʿasr (Commentary on the Surah al-ʿAṣr): This is one of the two important works the Báb penned in Isfahan. It was written spontaneously and publicly in response to a request by Mir Sayyid Muhammad, the chief cleric of the city; much of it was written in one evening, to the astonishment to those present. Maku, late summer 1847 – May 1848 The Báb left Isfahan in March 1847, sojourned outside Tehran several months, then was sent to a fortress at Maku, Iran, close to the Turkish border. It witnessed the composition of some of the Báb's most important works. Persian Bayán: This is undoubtedly the most important work of the Báb and contains a mature summary of his teachings. It was composed in Maku in late 1847 or early 1848. The work consists of nine chapters titled váhids or "unities", which in turn are usually subdivided into nineteen bábs or "gates"; the one exception is the last unity, which has only ten bábs. The Báb explained that it would be the task of "He Whom God shall make manifest" to complete the work; Baháʼís believe Baháʼu'lláh's Kitáb-i-Íqán to be the completion of the Bayán. Each unity begins with an Arabic summary of its contents, which makes it easier to read than many of the Báb's works. Extracts of this work are published in Selections from the Writings of the Báb; A. L. M. Nicolas translated the entire work into French in four 150-page volumes. Arabic Bayán: This is the shorter and less important of the two Bayáns. It consists of eleven váhids or "unities", each with nineteen bábs or "gates". It offers a succinct summary of the Báb's teachings and laws. It was composed at Maku in late 1847 or early 1848. Dalá'il-i-Sab'ih ("Seven Proofs"): There are two works by this name, the longer one in Persian, the shorter one in Arabic; both were composed in Maku in late 1847 or early 1848. Nicholas called the Persian Seven Proofs "the most important of the polemical works that issued from the pen of Sayyid ʿAlí Muhammad". The work was written to either a non-Bábí or to a follower whose faith had been shaken, but the recipient's identity is unknown. The