sentences:  To add to the confusion, having learned of al-Mustansir's passing, Baraqat, the chief missionary ("dāʿı̄") of Cairo (the head of the Isma'ili religious establishment) proclaimed Abdallah as caliph with the regnal name "al-Muwaffaq".However, al-Afdal soon regained control.Baraqat was arrested (and later executed), Abdallah and Isma'il were placed under surveillance and eventually acknowledged al-Musta'li, and a grand assembly of officials was held, which acclaimed al-Musta'li as imam and caliph.