Watson: The three rivals, Karim, Azad and Muhammad Hasan, proceeded to settle, by means of the sword, the question as to which of them was to be the sole master of Persia.

We read about it in vivid detail, from around the year 900, in the writings of the Persian physician Muhammad ibn Zakariya al-Razi.

His son `Abbas Efendi (also called `Abdu'l-Baha, " the servant of Baha ") was generally recognized as his successor, but another of his four sons, Muhammad `Ali, put forward a rival claim.

In his youth Muhammad traveled widely with camel trading caravans.

Mary was a perfectly legal concubine of Muhammad, but Hafsa was still upset as she had found them in her hut.