Wal Jack had an extensive range of correspondents throughout Australia and the world who often provided him with detailed drawings and notes on various tramway systems. The letter from a resident of Dusseldorf West Germany, details the author's travels, issues post World War 2, photos, enlargers, a visit to Koln or Cologne, war damage, photos of Russian tramcars, tramcars in use, the interurban line to Bonn and his forthcoming visit to "Dusseldor fer Waggonfabrik" which became the Duewag factory. A web search shows that the author published at least one book on trams.Demonstrates some of the correspondence that Wal Jack received from around the world.Letter typed on A4 paper with sender's stamp and address with a pencil sketch on the rear. letters, wal jack, railways, tramways, dusseldorf, duewag, koln, colongne