Bishop's map showed some 16 km of cave passages, half of which were discovered by him. While the map does not represent a modern accurate instrumental survey, he took some pains to indicate relative passage dimension and length, with cross shading to show water (as modern cave cartographers do.) The topology, if not the scale and orientation, of the map is accurate, that is, the indications of junction layouts correspond to reality in a way that some later celebrated maps do not. Beyond this, the Bishop map is the first to truly suggest, at a glance, the majestic scale of Mammoth Cave, especially its extraordinary degree of connectivity. In 160 years, Bishop's map has not lost the ability to inspire interest in both its subject and its source.