path has an eastern aisle containing five chapels, originally divided from one another by perpeyn walls. This plan was followed in the earlier church at Hayles (1249-51), before the eastern arm was extended to include the chapel of the Holy Blood. In some churches, as at Byland and Waverley, the processional path was provided by moving the high altar a bay west of the main east wall, and placing the chapels in the returned aisle, instead of building a special aisle for them beyond. On the other hand, the eastern limbs at Jervaulx, Rievaulx, Tintern, and elsewhere were rebuilt in the thirteenth century upon the ordinary aisled rectangular plan. The high altar was placed two bays west of the east end: the processional path was in the bay between it and the eastern chapels, which were ranged against the east wall. The presbyteries in these churches were usually walled off from the aisles, as may be seen in Tintern: the walls were provided for from the beginning and were sometimes bonded into the piers. As a rule, such aisled presbyteries were short. Four bays was a usual length, as at Jervaulx, Netley and Tintern: this allowed two bays for the high altar and presbytery, and the quire was left in its normal position. But at Rievaulx the eastern arm was lengthened to seven bays and included the quire. The thirteenth-century enlargement at Fountains gave four bays to the altar and presbytery, without removing the quire; while behind the altar was built a vast eastern transept two bays deep, with nine chapels against its east wall and a processional path in the western bay. This unusual and beautiful plan was imitated with great splendour in the Benedictine church of Durham. § 39. The chief peculiarity of the Cistercian transept was the arrangement, already described, of its eastern chapels. This was modified in later times, as at Furness, where the vaulting of the chapels was removed and replaced by a wooden roof at a higher level, and screen-walls took the place of the solid divisions. The night-stair from the monks' dorter was very generally placed against the west wall of the adjacent transept; while in the end wall of the opposite transept was the doorway through which funerals passed to the graveyard. At Furness, where the church, by an exceptional arrangement, stands between the greater part of the _curia_ and the cloister, this doorway formed the main entrance to the church and was covered by a porch. Beaulieu, like Cîteaux, has the unusual feature of a western aisle in the transept opposite the cloister. Such aisles, though sometimes found in both transepts of Benedictine churches, are rare in the churches of Cistercians. [Illustration: Fig. 4. Tintern abbey: north transept and presbytery, shewing doorways to dorter and sacristy.]