The Bahá'í era begins from a conversation. Mullá Husayn, a young Shaykhí cleric searching for the promised Qá'im after his teacher's death, arrived at Shiraz and was greeted outside the gate by a young man in a green turban who invited him home. There, on the evening of 22 May 1844, at two hours and eleven minutes after sunset — a precision the tradition preserves because the era and the timing of the holy day both depend on it — Siyyid 'Alí-Muhammad declared himself to be the one Mullá Husayn was seeking. The Báb, meaning the Gate, was the title he took. During that night he revealed a commentary on the Súrih of Joseph, the Qayyúmu'l-Asmá', in Mullá Husayn's presence, and Mullá Husayn accepted. Seventeen more accepted independently over the following months without being told of each other, and the eighteen together with the Báb constitute the nineteen of the first year. The principal source is Nabíl-i-A'zam's narrative, translated by Shoghi Effendi as The Dawn-Breakers, which is devotional history and reads as such.