Lewis' volume contains very detailed county maps of the entire island. His map of Co. Armagh shows the physical landscape and the major routeways. He also provided evidence for many historic place names.
Citation: Samuel Lewis, A Topographical Dictionary of Ireland (London, 1837). Marsh's Library Exhibits ‘Mapping History’ curated by Annaleigh Margey, Jason McElligott and Sue Hemmens with Armagh Robinson Library; Held by Armagh Robinson Library; accessed April 14, 2021, https://www.marshlibrary.ie/digi/exhibits/show/maps/item/586