Chapter 6
... He (Severus) passed the walls of Hardian and Antonius, and entered the ememy's countyr with a design of completing the long attemped conquest of Britain. He penetrated the nothern extemity of the island without meeting an enemy. But the concealed ambuscades of the Caledonians, who hung unseen on the rea and flanks of his army, the coldness of the climate, and the severity of a winter marhc across the hills and morasses of Scotland are reported to have cost the Romans above fifty thousand men. The Caledonains at lenght yeilded to the powerful an obstinate attack, sued for peace, and surrended a part of their arms and a large track of land.
But their apparent submission lasted no longer than the present terror.
As soon as the Roman legions had retired they resumed thier hostile independence. Their restless spirit provoked Severus to send a new army into Caledonia, with the most bloody orders, not to subdye to but extirpate the natives. They were saved by the death of [Severus].