Here, straight as a swan-flight along the ridge of the watershed, commanding the country for miles upon either side, still runs the ancient highway of Imperial Rome. From the golden milestone of Augustus in the Capitol, in a line scarce broken by the blue straits of the sea, ran hither the path of that ancient Power. Of old, along these far-stretching arteries came pulsing in tidal waves the iron blood of the stern heart beating far away in the south. From the wooded valleys below, the awed inhabitants doubtless long ago looked up and wondered, as the dark masses of the legions came rolling along these hills. Tide after tide, like the rising sea, they rolled to break upon the Grampian barriers of the North. Here rode Agricola, his face set towards the dark and mist-wrapt mountains beyond the Forth, eager to add by their conquest the word “Britannicus” to his name. Here by his side, it is probable, rode the courtly Tacitus, his son-in-law, to describe to future ages the Scotland of that time, “lashed,” as he knew it, “by the billows of a prodigious sea.” Southward here, stern and intent, once sped the swift couriers bearing to Rome tidings of that great battle at Mons Grampus, where the bodies of ten thousand Caledonians slain barred the northward march of the Roman general. Southward, again, along this road it is almost certain has passed the majesty of a Roman Emperor himself. For in the year 211 the Emperor Severus, ill and angry, leaving fifty thousand dead among the unsubdued mountains of the North, was borne out of Scotland by the remnant of his army, to die of chagrin at York. And here, long ago, by his flickering watch-fire at night, the Roman sentinel, perhaps, has let his thoughts wander again sadly to his home by the yellow Tiber two thousand miles away, to the vine-clad cot where the dark-eyed sister of his boyhood, the little Livia or Tessa, would be ripening now like the olives, with no one to care for and protect her. [Illustration]