Experts have made Iqbal's thought the subject of their research. This is how Iqbal's thoughts have grown. Syed Muzaffar Hussain Burni of India was the grandfather of Iqbal's thought. He has held high government positions. Despite his responsible engagements, he played an important role in the expansion of Iqbal's thought. He arranged Iqbal's letters. He has also pointed out errors in the letters. This is due to editing and publishing. He carefully read the available texts of the letters. He has also included collections of other experts in the layout of the letters. They have also been used and cited. Objections have also been raised in some places. He has also presented arguments and reasons. He has also arranged the footnotes. We are grateful to him because he made access to Iqbal's letters very easy. Due to his efforts, ways have opened up for research and criticism and new sources have become available to Iqbal's thought.