This stretch stands to the wall walk, with most of the parapet surviving, some of it beneath later walling over blocked embrasures. Two external base chamfers step down north of Morden Tower and disappear. The original face, on both sides, is of large well-dressed masonry, but there has been much patching at different times on the inside, and there is one prominent vertical joint. There are the remains of two turrets. SCHEDULED ANCIENT MONUMENT AND LISTED GRADE 1

Semi-circular in plan, with a rectangular ground floor, the room lit by 3 loops (as at Heber and Durham Towers). Probably built before the curtain. It displays the other usual features, e.g. vault and ground floor door, but the side stairs to the wall walk were destroyed in one of the post-medieval alterations. In 1619-20 the tower was leased by the Company of Plumbers, Glaziers and Pewterers, who converted it into their meeting house, and made further alterations in 1700. The upper storey, redesigned ground floor door and external stair carved out of the curtain presumably date from one of these times. The front (west) face of the upper room is semi-circular, and built of ashlar above a moulded string course; the back is of brick. It is believed that the stone is early 17th century, and the brick late 17th century. The tower has had various post-medieval uses. The roof and upper room have recently been repaired. The Tower was recorded and excavted in 2012-2013 by NCAS due to a rodent infestation in the building. Soft deposits were removed within the footprint of the tower. A medieval garderobe was revealed on the north side of the tower which had been blocked in the 19th century. Sandstone slabs resembling a truncated wall foundation was revealed encased in the tower foundations. This may represent an earlier feature, possibly a wall defining the northern boundary of the Warden's Close, part of the Black Friars precinct. SCHEDULED ANCIENT MONUMENT AND LISTED GRADE 1

Between the Black Friars postern and Morden Tower there exists another blocked postern, taller than the medieval one and with a brick arch. This was created in 1824 to give access to the new bowling green laid out on part of the Warden's Close. SCHEDULED ANCIENT MONUMENT

In 1280 the Dominican friars were given licence "to make a narrow gate through the new wall surrounding the said town, which will have to be made through the garden of the said friars, for ingress into the said garden,…on condition that the sheriff of Northumberland or the constable of the castle…may stop it when they please for a time". This postern survives, blocked on its east (inner) face in the late 19th century, in the curtain between Heber and Morden Towers. SCHEDULED ANCIENT MONUMENT

In 1805 granted a lease to the trustees of the newly established Fever Hospital (House of Recovery) of part of the Warden's Close, with permission to build the hospital there and to take down part of the town wall in order to provide them with access into the south end of their precinct. In the event they made quite a modest break through the wall, and this survives, with some alteration, on the north side of Heber Tower. SCHEDULED ANCIENT MONUMENT

A stretch of curtain 115 yards long connected Heber and Morden Towers. It has been pierced for gateways in 3 places (HER REF. 1534-1536), and reduced in thickness on the south side of Modern Tower to accommodate a flight of stairs. Close to the bowling green postern is the finest of the surviving turrets on the wall – surviving is a complete passage, about half the original external stairs and most of the machicolations above the loop. The wall itself does not stand quite to the wall walk; beneath the corbels of the turret it is 16 courses high on 2 projecting base courses, and it has a double chamfer along the foot of the external face. SCHEDULED ANCIENT MONUMENT AND LISTED GRADE 1

Substantially complete, with only minor alterations, at the west angle of the wall. It comprises a single-storeyed, semi-circular structure with oblong rib-vaulted room, its 3 cross loops complete, one stair surviving to the wall walk, and a garderobe with external chute off the stair. On the exterior are 6 sets of 2 oversailing corbels. In 1620 the Company of Armourers, Curriers and Feltmakers agreed to repair the tower; further works being carried out in 1632-3, 1644 and 1770. The door was reinstated in its central position in 1931. In the late 19th century it was a blacksmith's shop, and was in danger of demolition. SCHEDULED ANCIENT MONUMENT AND LISTED GRADE 1

A 77 yard stretch of curtain connected Durham and Heber Towers, and much of it still stands to the height of the wall walk. On the interior the curtain rises from 7.5 courses by Durham Tower to 15 below the 7 corbels remaining of a turret on the south side of Stowell Street. There appear to be steps surviving on the wall walk, a few courses of the outer parapet, and the hint of an inner parapet (perhaps the result of restoration) on the north side of Durham Tower. On the exterior there is a double chamfered stepped base course, and apparent vertical joints on the outer wall of the turret. Perhaps the remains of the loop. The outside of this stretch became partly encumbered with buildings – but these were removed (perhaps in 1958) SCHEDULED ANCIENT MONUMENT AND LISTED GRADE 1

An almost complete example of a single-storeyed semi-circular tower. The rectangular rib-vaulted room is lit by two surviving loops (the third is now a door), and was originally entered from the intra-mural lane though this door is now blocked. Externally the tower retains traces of six sets of three oversailing corbels to support a bretasche; the parapet round its flat roof is largely missing. It is not clear how the roof of the tower was reached. Was once used as a military lock-up, and in the 19th century "as a coal and lumber room for the adjoining school". SCHEDULED ANCIENT MONUMENT AND LISTED GRADE 1

Between West Gate and Durham Tower there was originally a stretch of wall 101 yards long with, according to Holmes, 2 turrets. Of this piece of curtain more than half survives. The outer face stands 14-15 courses above the single chamfered base course, but the inner face next to the tower only 8.5 courses because of the artificially high ground level. It does not therefore stand as high as the parapet walk. Oliver (1830) shows buildings against the whole of the outer face, over the filled-in ditch, and the hint of a door through the curtain. The site was finally cleared in 1958, and was then landscaped and the wall extensively patched. The site of the ditch is now a garden between the wall and Bath Lane. The intra-mural road remains open at the rear of the wall. SCHEDULED ANCIENT MONUMENT