Renowned historian of Karachi Saaiin Gul Hassan Kalmatti will discuss history of Karachi through ages until 1947.
Saain Kalmatti written extensively on Karachi. He has published many articles and a book about Karachi “Karachi Sindh Jee Marvee” History & Research on Karachi.
You can find that book on Sindhi Adabi Board site
http://www.sindhiadabiboard.org/