The central window directly over the Communion Table was erected in memory of Archbishop Ussher by Dr. Butcher, Bishop of Meath, in 1869. This window was painted in Munich, and the price, £300, which was paid by Dr. Butcher, was one quarter’s salary of the Regius Professorship of Divinity, of which office he continued for three months to perform the duties, after his consecration as Bishop of Meath. Partly over the narthex or ante-chapel, in the deep recess under the portico, and partly over the stalls of the Provost and Senior Fellows, is the spacious organ gallery, in which is placed the organ. When the present Chapel was approaching completion, a commission was given to Green, the favourite organ-builder of George III., to provide an instrument suitable for the new building. The price was to be five hundred guineas. And an instrument sweet rather than powerful in tone, like most of Green’s, was accordingly placed in the organ loft. All that now remains of this organ of Green’s is the present choir manual of only four stops. On account of the beauty of its stopt diapason (deep, and not deformed by the usual quintation effect), the Board retained this choir organ manual, but they were induced in 1838 to abandon the remainder to Telford, a local builder, who sold it to the Church at Durrow, Queen’s County, where Mr. Flower, subsequently Lord Ashbrook, maintained for some time a choir and the Cathedral service. In its place in the College Chapel, Telford put up a Great Organ and Swell Organ, which were used in conjunction with Green’s older manual and an imperfect pedal organ. In 1879 these two manuals and the pedals were enlarged, altered, and greatly improved, and further additions were made by Hill & Son, of London; and the mahogany cases of Green’s instrument were enlarged to admit of this augmentation. The organ as it stands at present contains the following stops, all effective and brilliant, but with none of the harshness to be heard in so many organs of the present day:-- No. 1.--Swell Organ (Upper Row of Keys). Compass, double C to F. Soft Bourdon, 16 feet tone. Open Diapason, 8 ” ” Dulciana, 8 ” ” Flute, 4 ” ” Principal, 4 ” ” Fifteenth, 2 ” ” Piccolo, 1 ” ” Soft Mixture of 3 ranks, 12, 15, 17. Oboe, 8 ” ” Vox humana, 8 ” ” Trumpet, 8 ” ” No. 2.--Second Manual or Great Organ, CC to F Compass.