Sec. 71. One very important consequence of the addition of aisles and chantry chapels to chancels, at any rate on a large scale, is seen where they are applied to plans originally cruciform. We have already seen that at St Mary's, Shrewsbury, and at Arksey, although much of the fabric of the old transepts was left, broad chancel chapels tended to obliterate the cruciform character of the building. The transepts at Spalding almost escape notice, owing to the double aisle on the south side of the nave, the aisle and north chapel on the opposite side, and the large chapel east of the south transept. Moreover, when, in the fourteenth and fifteenth centuries, aisles were rebuilt or widened, there was always, as at Tansor, a tendency to decide the width of the aisle by the length of an existing transept or transeptal chapel, and to build the new outer wall flush with its gable wall. In this case, the aisle would be planned to communicate with the transept, and the west wall of the transept would have to be cut through. Where, as at Arksey, there was a central tower, the old transept was structurally necessary, and only as much of its masonry would be removed as was absolutely necessary. But we have seen that there were cases in which it was thought advisable to take down the central tower altogether, and build a new one at the west end, in which case the transepts were of no structural use; and there were far more cases in which the transeptal excrescences were merely projecting chapels. In these instances, the transept was felt to intervene awkwardly between the aisles of nave and chancel. Accordingly, its side walls and gabled roof were taken down, its end wall was remodelled, and it was placed under one roof with the adjacent aisles, in which it became merged. The cruciform plan was thus lost in certain churches, becoming absorbed in the ordinary elongated plan, with aisles to nave and chancel. Tamworth church in Staffordshire, and Marshfield in Gloucestershire, had twelfth century central towers. These were removed or destroyed, at Tamworth in the fourteenth, at Marshfield in the fifteenth century, and the aisles and chancel chapels were widened to the original length, approximately, of the transepts. The north and south arches of the crossing, however, remain in a blocked condition, and tell the tale of what has happened. Wakefield cathedral is another instance of a large parish church whose aisleless cruciform plan has gradually disappeared within the aisles, until the plan is--or was till the additions of a few years ago--an aisled rectangle, the origin of which is certainly not obvious at first sight. The transformations here described must clearly be understood not to apply to cruciform churches generally, but merely to churches which, with an originally cruciform plan, needed enlargement. Many handsome late Gothic buildings, like the churches of Rotherham and Chesterfield, or St Mary's