Simplify the following text for a Grade 4 native English-speaking person.
Original: Soon after he arrived in Shiraz , MullÃ Husayn came into contact with the BÃ b. On the night of May 22 , 1844 , MullÃ Husayn was invited by the BÃ b to his home ; on that night MullÃ Husayn told him that he was searching for the possible successor to Siyyid KÃ zim , the Promised One .
Simplified: After spending the night talking to the BÃ b MullÃ Husayn said this .