Chapter 15 ESCAPE.

The great convict prison of Princetown stands on the wildest part of Dartmoor, nearly fifteen hundred feet above the sea, surrounded by wild, rock-strewn tors, whose heather-covered slopes stretch for miles in every direction. Four main roads cross the moor from Plymouth to Moretonhampstead, and Tavistock to Ashburton. These unite at Two Bridges, w