At the Times, extracts from a Philip Howard's alluring-sounding The British Library: A Treasure House of Knowledge. On the map reproduced above:
This 1977 map looks unusual but strangely familiar. It shows parts of Essex and Kent linked across the River Thames by the Dartford Tunnel, but it is in Russian. It was not realised outside the Eastern Bloc that the Soviet military were secretly mapping the world at several scales. Their maps are backed with detailed information, down to the types of trees and the number of telephones in a village.