July 20

His [the Báb’s] visit to Hijáz was marked by two episodes of particular importance. The first was the declaration of His mission and His open challenge to the haughty Mírzá Muhít-i-Kirmání, one of the most outstanding exponents of the Shaykhí school, who at times went so far as to assert his independence of the leadership of that school assumed after the death of Siyyid Kázim by Hájí Muhammad Karím Khán, a redoubtable enemy of the Bábí Faith. The second was the invitation, in the form of an Epistle, conveyed by Quddús, to the Sherif of Mecca, in which the custodian of the House of God was called upon to embrace the truth of the new Revelation. Absorbed in his own pursuits the Sherif however failed to respond. Seven years later, when in the course of a conversation with a certain Hájí Níyáz-i-Baghdádí, this same Sherif was informed of the circumstances attending the mission and martyrdom of the Prophet of Shíráz, he listened attentively to the description of those events and expressed his indignation at the tragic fate that had overtaken Him. 
(Shoghi Effendi, ‘God Passes By’)