ウィリアム要塞
↑ Krishna Dutta (2003). Calcutta: A Cultural and Literary History. pp. 71. https://books.google.co.in/books?id=UKfoHi5412UC&pg=PA71&dq=fort+william+calcutta&hl=en&sa=X&ei=INoHUKDeJ4fXrQfSo8X1Ag&ved=0CDoQ6AEwAg#v=onepage&q=fort%20william%20calcutta&f=false