148 TRANSACTIONS OF THE PLYMOUTH INSTITUTION. 
A tongue of the northern high ground trends southward by Great 
Mis Tor, Bair Down, and North Hessary Tor, each over 1700 feet. 
The high land of the southern quarter rises at Peters Bound 
Stone to 1694 feet, and for an area of about six miles by four 
has an elevation of 1500. 
The only other specially-elevated region is in the east, where 
Eippon Tor and Hamildon are the most prominent heights. 
These points will be more clearly recognised in the diagram, where 
it will be seen that Dartmoor has two main areas of elevation and 
two main systems of watershed, the principal rivers flowing east, 
west, north, and south from around Cranmere ; while the Avon, 
Erme, Yealm, Plym, and Meavy issue west, south, and east from the 
southern centre, the northern streams of which flow into the Dart. 
1500 feet. 1800 feet. 2000 feet. 
Sketch Map of Dartmoor, showing Contour Areas, and 
Main Watersheds. 
This map represents the Dartmoor granite, with a general height of 1200 
feet. The contours shown are those in which the leading points reach the 
elevations given. They are general contour areas, not lines. 
