they were learning, and every week added to their experience was a week in Pompey's favour. With hope of forcing a battle, Cæsar managed to get his army between Dyrrachium, in which were kept all Pompey's stores and wealth of war, and the army of his opponent, so that Pompey, as regarded any approach by land, was shut off from Dyrrachium. But the sea was open to him. His fleet was everywhere on the coast, while Cæsar had not a ship that could dare to show its bow upon the waters.
There was a steep rocky promontory some few miles north of Dyrrachium, from whence, there was easy access to the sea, called Petra, or the rock. At this point Pompey could touch the sea, but between Petra and Dyrrachium Cæsar held the country. Here, on this rock, taking in for the use of his army a certain somewhat wide amount of pasturage at the foot of the rock, Pompey placed his army, and made intrenchments all round from sea to sea, fortifying himself, as all Roman generals knew how to do, with a bank and ditch and twenty-four turrets and earthworks that would make the place absolutely impregnable. The length of his lines was fifteen Roman miles,—more than thirteen English miles,—so that within his works he might have as much space as possible to give him grass for his horses. So placed, he had all the world at his back to feed him. Not only could he get at that wealth of stores which he had amassed at Dyrrachium, and which were safe from Cæsar, but the coasts of Greece, and Asia, and Egypt were open to his ships. Two things only were wanting to him,—sufficient grass
