http://wikiless.i2p/wiki/Mirza_Basheer-ud-Din_Mahmood_Ahmad?lang=en
The next day on 27 May 1908, he gave the pledged allegiance to Hakeem Noor-ud-Din , who had been chosen to succeed Ghulam Ahmad. After the passing of his father, Mahmood Ahmad continued to study the Quran , Sahih Bukhari , the Masnavi and some medicine under the tutelage of Noor-ud-Din, with whom he developed a close friendship.