""A New Key To Unlock Every Kingdom, State, And Province In The Known World: Containing The Length, Breadth, And Population Of Each Kingdom, And Their Chief Cities"" is a book written by A.G. Hamilton in 1850. The book provides a comprehensive overview of all the kingdoms, states, and provinces in the known world at the time, along with their geographic dimensions and population statistics. It includes information on each kingdom's chief cities, enabling...