Findlay Muirhead, Encyclopædia Britannica, Ninth Edition (1888)
“ On the west or Hungarian side there are various wide and comparatively easy passes into the interior, but on the east and south frontiers the lofty bounding mountains present steep and rugged faces outwards, giving to Transylvania the general aspect of a huge natural fortress. These mountains are a continuation of the Hungarian and Galician Carpathians; in fact, the mountains of Transylvania may be regarded together as forming the south eastern main group of the Carpathian system. The loftiest and most rugged peaks are on the north and south boundaries. ”
