Unlike the piers of the Lady Chapel, the bases here are of marble, though the plinths are of stone. Two grotesque heads, lower than the bosses, at the north and south-western angles, hold three ribs in their mouths, the ribs, which end there in seeming futility, being used to cover an awkward corner of the vaulting. GLASS IN THE CHOIR AISLES AND CHAPELS.--A good deal of glass in a more or less fragmentary condition survives in the eastern portion of the church. It is fine work of the first half of the fourteenth century. In the south aisles there is good glass in all the upper lights; the third window has later glass in the lower lights, which bears the date 1607, and consists of coats of arms and a series of small square pictures of foreign type. The east window of St. Catherine's chapel is composed of fragments fitted together at random; in the upper lights of the south window are rather coarse heads of St. Aldhelm, St. Erkenwald, and other saints: two of them should be noticed for the early form of papal tiara. In the corresponding chapel of St. Stephen both the east and north windows are the same, the north window even containing a second head of St. Erkenwald; the other saints are inscribed--"St. Stephanas Papa" (the Pope Stephen, who died 257), "S. Blasii Epi" (St. Blaise), and "S. Marcellus Papa"; in the topmost light of both windows is a small figure of Our Lord. In the north aisle, the first window (counting from the east) contains a St. Michael; the next a crucifix and a figure of St. Mary Magdalen, with some sixteenth-century coats (including the curious arms of Bishop Knight, p. 87) in the lower lights. Similar coats are in the third window, which has a figure of St. John Baptist. The fourth window contains modern glass erected in honour of Bishop Ken (p. 157), as a memorial to Dean Plumptre, who died in 1891. In the centre Ken is represented in full pontifical vestments, below him angels are supporting his arms impaled with those of the see; over his head is the favourite superscription of his letters, "All glory be to God," and at his feet his rule of life "_Et tu quæris tibi grandia? Noli quærere_" (Jer. xlv. 5). The left-hand panels represent St. Paul teaching Timothy (because Ken wrote the "Manual for Winchester Scholars," and the "Exposition of the Catechism"), Christ's charge to St. Peter; the right panels represent St. Paul before Agrippa and St. Peter in prison (because Ken was one of the seven bishops imprisoned by James II.). The two lower panels represent labourers going to their work singing _Benedicite_, and a priest and choristers chanting _Nunc Dimittis,_ in allusion to Ken's morning and evening hymns.