[Illustration: THE WALL SEEN FROM CUDDY'S CRAG. HERE FOR A LONG DISTANCE IT IS EASY TO WALK ALONG THE TOP OF THE WALL, WHICH IS 8 FEET WIDE, AND 5 OR 6 FEET HIGH.] The Wall is best preserved on the lonely heights, as at Borcovicium, where in parts it may be seen going up hill and down dale, at its original width {29} of 8 feet, and 5 or 6 feet high. The greatest height of any fragment still standing is 9 feet 10 inches, at Hare Hill, Banks, in Cumberland. The forts along the Wall, or "stations," as they are sometimes called, are military cities, set at an average distance of five miles apart, with barracks, storehouses, baths, etc., and very often with suburbs outside the enclosing wall. The clue to the names of the forts has been found in a document which has fitly been called the "Who's Who" of the later Roman Empire. This document is known as the _Notitia_; and the section which refers to the Wall is headed, _Item per lineam Vatti_. Then follows a list of all the forts along the Wall, with the name of the body of troops stationed at each. There are twenty-three on the list, and only the first twelve have been satisfactorily identified--as follows: _Fort._ _Troops._ _Modern name._ Segedunum. 4th Cohort of the Lingones. Wallsend. Pons Aelii. 1st Cohort of the Cornovii. Newcastle. Condercum. 1st _ala_ (or wing) of the Asturians. Benwell Hill. Vindobala. 1st Cohort of the Frixagi (Frisii) Rudchester. Hunnum. The Savinian _ala_. Halton Chesters. Cilurnum. 2nd _ala_ of Asturians. Walwick Chesters. Procolitia. 1st Cohort of the Batavians. Carrawburgh. Borcovicium. 1st Cohort of the Tungrians. Housesteads. Vindolanda. 4th Cohort of the Gauls. Chesterholm. Æsica. 1st Cohort of the Asturians. Great Chesters. Magna. 2nd Cohort of the Dalmatians. Carvoran. Amboglanna. 1st Cohort of the Dacians, Birdoswald. styled "Aelia." {30} The means of identification has been by altars or other inscribed stones found on the spot. For instance, at Housesteads was found an altar with this inscription: "To Jupiter, the best and greatest, and the deities of Augustus, the first cohort of the Tungrians (a military one) commanded by Quintus Verius Superstis, præfect." At Carrawburgh there was found a stone of the date 237 A.D., with the words "COH · I · BATAVORUM" very clearly inscribed. At Chesterholm more than one altar has been found inscribed "COH · IIII · GALLORVM." At Walwick Chesters was found an important slab declaring that "the [soldiers] of the second _ala_ (or cavalry regiment) of Asturians restored [this temple which had fallen down] through age." At Great Chesters a roofing slab was found stamped "COH · I · ASTVR," besides other inscriptions.