The south aisle roof is partly lead (Scott) and partly, at the eastern end, of red tiles (Lord Grimthorpe). Lord Grimthorpe cut four windows in the western bays of the aisle, in which no windows had originally existed, as domestic buildings abutted against the church here. The three eastern windows of Abbot William of Trumpington's time were rebuilt in the old style; the five bays to the west of these were refaced with brick and flint, as the original clunch stone had perished, owing to exposure to the weather. The arcading of the north walk of the cloister may still be seen. It will be noticed that this arcading did not follow the division into bays of the aisle walls above. The cloister walk acted as a kind of continuous buttress to the south aisle wall, and owing to its removal this part of the wall was gradually pushed outward. To strengthen it Lord Grimthorpe built buttresses, naturally following the division of the upper part of the walls, but thereby cutting across the arcading of the cloister walk in a most ugly fashion. By building flying buttresses instead, he might have preserved the whole of the arcading of the cloister walk unbroken, but he considered that this plan would have been ugly, and that the buttresses he did build were constructively better; possibly they may be, but most of us will be of the opinion that, as far as appearance goes, the plan adopted was the less satisfactory. The porch over the Abbot's door in the corner is entirely new. It probably is useful as a support for the wall, but that is all that can be said in its favour. Lord Grimthorpe thought that this would be used as an entrance to the church on this side, but it has not been so used. It is worthy of notice that this church is destitute of porches, either on the southern or northern side; probably because they were not needed in a purely monastic church. [Illustration: THE SOUTH TRANSEPT AS REBUILT.]