The second 18xx game ever published, 1829 Northern Board (usually referred to as 1829 North) is basically the same game as the original 1829 game with a different map covering Northern England and Scotland, a different set of corporations, and some minor rule changes. Many of the companies in the original 1829 are used in the Northern versions, as is the surveyor which was abandoned when 1830 was published in 1986.Large portions of the map from 1829 North overlap map sections on the original 1829 board, and the rules do not cover combining the two games. The reason for this is that Francis Tresham (the designer of both games and 1830 and Civilization) felt that the combined game would be too large and unwieldy. However, 18xx fans have always been fond of experimenting with the system and creating new variations with different locations. A link is provided below to information on how some 18xx fans have combined the two games. - BoardGameGeek