In 1831 the fabric was again thoroughly repaired, the roof redecorated, certain stalls elevated, desks at the east end constructed, and a new scheme of lighting by candelabra introduced. A few years later, in 1838, the Society for the Prevention of Cruelty to Undergraduates concerned themselves with marking the attendance of fellows in chapel. That incident I have described elsewhere. In 1867-75 the building was again thoroughly overhauled, the south side faced with stone, a porch, a new vestry, and a choir-room built, the organ screen moved a few feet westward, the walls and roof painted, gilding used freely on the panelling, the windows filled with stained glass, backed benches and kneeling stools introduced for undergraduates, and the building lighted with gas. During part of the time occupied by this restoration, the College used St Michael's church as its chapel. According to the scheme of decoration, adopted on the advice of Lightfoot and Westcott, if we proceed eastwards up the chapel we are supposed to note, in order, the frescoes on the walls (which represent old testament heroes and teachers) and paintings on the roof (which illustrate the Benedicite), leading up through Jewish history to the birth of Christ, and then, returning westward, to have suggested to us, by the successive windows, the historical development of Christianity and the growth of learning particularly in the University and College. A man might worship many years in the chapel before he discovered this design. The panels in the sacrarium are replaced by intarsia work in which all the woods used are of their natural colours. The sixteenth-century silver cross on the communion table came from Spain. The wrought-iron gas standards here and through the chapel are also worthy of note; fortunately they were allowed to remain when the electric light was introduced. All this, as well as the scheme of decoration of the antechapel, is described in guide-books with more or less accuracy. Probably the services were never rendered more effectively than in the years following this restoration. Attendance on Sunday evening was required unless absentees could urge conscientious or other good reasons for exemption, but a large proportion of those who might have obtained exemption did, in fact, take part in the Sunday services. More benches were placed in the chapel than are there now, and the building, with every seat occupied and everyone (save a few privileged visitors) in a surplice, presented a most impressive scene. Electric light was introduced in 1893, and has added much to the comfort of congregations in winter evenings.