Rejoining the Wall, we meet, when within a quarter of a mile of Old-wall, with the site of a mile-castle. The ruins of the building slightly raise it above the general level, and prevent the plough biting into it. The road formerly deviated from its track to go round it. An altar, an urn, and several coins of Edward I., have been found in it. In the buildings at Old-wall, many Roman stones will be noticed, and the earth-works of both lines of the Barrier may be traced. The Wall is entirely uprooted; upwards of six hundred cart-loads of stones, within the recollection of the inhabitants, have been taken from it in this immediate vicinity. Between this point and Stanwix, the works may be traced with tolerable satisfaction, an ancient drove-road running upon the site of the Wall for the greater part of the way. [Sidenote: BLEATARN.] At Bleatarn (blue tarn or lake), on the south side of the Wall, is a mound of earth resembling an elongated barrow; between this earth-work and the Wall, is a marshy hollow, which is said to have formerly been the bed of a lake or tarn. The Vallum takes a sweep to avoid this morass, and at its greatest distance is removed from the Wall about two hundred and twenty yards. About half-a-mile south from Bleatarn, is the site of a Roman camp, which Horsley conceived to be one of the stations _per lineam Valli_; it is now called Watch-cross. If it be a station of this class, and if the order in which the stations are arranged in the Notitia exactly corresponds with their consecutive positions in reality, the name of it was ABALLABA, which was garrisoned by a _numerus_ or troop of Moors, under a prefect. There is, however, reason to doubt whether this was a stationary camp at all, as will presently appear. As already remarked, no inscribed stones have been found to identify any of the stations west of AMBOGLANNA with the list given in the Notitia. Even though this difficulty respecting Watch-cross had not occurred, to go on appropriating the names of the Notitia, station after station, guided solely by the slender thread of the order of their succession, would be a hazardous undertaking, and is rendered still more so by the uncertainty existing as to those which are, and which are not, _stationes per lineam Valli_. In our journey from this point westward, the stations will, therefore, be designated by their modern names; when the Latin names are added, it is to be understood that they are conjectural. [Sidenote: WATCH-CROSS.] _WATCH-CROSS._—Horsley gives the following account of this station:—