Sequential excerpts from the book ‘God Passes By’, written in 1944 by Shoghi Effendi, the Guardian of the Baha’i Faith

3/25/20

September 1844: The Báb, accompanied by Quddús, set out for Mecca

It was not until, however, the Báb had received the eagerly anticipated letter of Mullá Husayn, His trusted and beloved lieutenant, communicating the joyful tidings of his interview with Bahá’u’lláh, that He decided to undertake His long and arduous pilgrimage to the Tombs of His ancestors. In the month of Sha‘bán, of the year 1260 A.H. (September, 1844) He Who, both on His father’s and mother’s side, was of the seed of the illustrious Fátimih, and Who was a descendant of the Imám Husayn, the most eminent among the lawful successors of the Prophet of Islám, proceeded, in fulfillment of Islamic traditions, to visit the Kaaba. He embarked from Bushihr on the 19th of Ramadán (October, 1844) on a sailing vessel, accompanied by Quddús whom He was assiduously preparing for the assumption of his future office. 
- Shoghi Effendi  (Chapter 1, ‘God Passes By)