TITLE: Kolkata (India)SECTION:
Growth of the city
...from ʿAlī Vardī Khan, the nawab (ruler) of Bengal, to dig an entrenchment in the northern and eastern part of the town to form a moat on the land side. This came to be known as the Maratha Ditch. Although it was not completed to the southern end of the settlement, it marked the city’s eastern boundary.