The Cambridge History of India, Vol. III: Turks and Afghans v3.c24.27

v3.c24.27

On his death in 1431 he was succeeded by his son, Shams-ud-dīn Ahmad, who reigned until 1442, but of whose reign little is known, except that Bengal suffered at this time from the aggression of Ibrāhīm Sharqī of Jaunpur. Ahmad is said to have appealed to Sultān Shāhrukh, son of Tīmūr, who addressed to Ibrāhīm a remonstrance which proved effectual. Towards the end of Ahmad's reign his tyranny became unbearable, and he was put to death by conspirators headed by Shādī Khān and Nāsir Khān, two of his principal officers of state, who had originally been slaves and owed their advancement to his favour. Each had designs upon the throne, but Nāsir Khān forestalled his confederate and, having put him to death, assumed the sovereignty of Bengal under the title of Nāsir-ud-dīn Mahmūd. He claimed descent from Iliyās, and in his person the line of the house which had compelled Delhi to recognise the independence of Bengal was restored.