The above PDF document is a chapter from some architecture related book. The Author S P Shorey writes in detail of an old map of Hyderabad that was discovered in the early 20th century. A fascinating study of the map follows, supported by actuall survey maps from the early 1920s. The map snippets showing old city from about a 100 years back and is just lovely for someone like me who likes Maps .
More links to old maps of Hyderabad
A Quranic Paradise in Arch Metaphors