§ 42. The plan of Haughmond and Lilleshall, in which the presbytery walls remained unpierced, while they were flanked with aisle-like chapels, is found in some Premonstratensian churches, as at Dale. At West Langdon the chapels were continued the whole length of the presbytery. Usually, however, they stopped short of the east end. The aisleless projection thus formed might contain, as at Alnwick, the high altar. But at St Radegund's near Dover, the eastern bay was the Lady chapel, and between it and the high altar was a space for processions, entered by doorways in the walls which divided it from the aisles and in the screen on either side of the high altar. In many Augustinian churches a further development of this plan is found, in which the chapels are real aisles, divided by arcades from the presbytery, as at Cartmel and Lanercost, and the eastern arm is so lengthened as to include the quire or a portion of it. At St Frideswide's, Oxford (now Christ Church cathedral), Repton and Dorchester, where the plans are somewhat complicated by the addition of one or more extra chapels on one side, the high altar was, as at Cartmel and Lanercost, in the eastern bay, and the procession in going from one aisle to another had to pass in front of it. The aisled portion, however, was sometimes planned, as at Bristol, to include the quire and presbytery and a bay for the processional path behind the high altar: this was also the plan of the church of secular canons at Southwell. The eastern limb of Christchurch, Hants, is similar in plan to that of Bristol; but here the high roof stopped above the altar, and the roofs of the processional path and Lady chapel, as at Winchester, are on a level with those of the aisles, while above them is an upper story or loft, formerly the chapel of St Michael. The ground-plan of the Cluniac church of Castle Acre was enlarged on the lines followed at Cartmel and Lanercost: that of Wenlock approximated to those followed at Bristol and Christchurch. Variations of these types of plan are seen in the thirteenth-century enlargements of the Benedictine churches of Rochester and Worcester, in which the quires were placed in the eastern arm. Both churches have eastern transepts, and in both cases the high vault was continued to the end of an aisleless eastern projection, in which the high altar stood at Rochester with a clear space behind it. At Worcester the aisleless bay was the Lady chapel, and the high altar stood west of the processional path.