Bahai and the succession of Bahaulla

For background:
en.wikipedia.org...


Now, the thing is, supposedly the Bab, Mirza Husayn, and two others knew that Mirza Husayn was the Bahaullah, and he arranged so that MH could conduct his business in secret, with Ṣubḥ-i-Azal acting as the interim leader of the faith, (and Ṣubḥ-i-Azal didn't know who the Bahaullah was). Supposedly this is evidenced by the Bab giving MH his pendants, rings, writting instruments, and documents upon his execution in 1850.

But supposedly also MH only knew that he was the Bahaullah until after the execution of the Bab, while he was in prison.

Hows that work out? Any Bahais on the board or people knowledgable about this religion that can clarify? Is perhaps the idea that the Bab knew who the Bahaullah was inaccurate and even he didn't know?