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Quite possible.  As I've alluded to in other posts, things often got mixed up when the explorers noted these things down.  I've only ever heard Black Mountain and Mount Ainslie mentioned, but it could have been Mount Ainslie and Mount Majura.  I still think the ""Nganbra"" explanation should be present in the ""Canberra"" article as well as the ""History of Canberra"" article.   "