In anticipation of an appointment to the position of Director of Excavations at Glastonbury Abbey on behalf of the Somerset Archæological Society, of which he was a member, F.B.B. had, during 1907, devoted considerable time to the study of the ruins and their history, and to that of the older religious foundations, and in this J.A. assisted him. Most of the surviving accounts of the Abbey were gone through, both the works of the mediæval writers and those of the seventeenth, eighteenth, and nineteenth centuries, with the fragments collected by them from older sources. Among the first, the works of William of Malmesbury, Adam de Domerham, William Wyrcestre, and John of Glaston, were examined, whilst Leland was not overlooked, and the later antiquaries, Hearne, Dugdale, Hollar, and Stukeley, had their share of attention. Following these, Browne-Willis, Britton, Carter, Collinson, Phelps, Kerrich, and Warner, were consulted, and finally some careful attention was bestowed on the modern antiquaries, Parker, Freeman, and last, but not least in importance, Professor Willis, whose _Architectural History_ was the standard book of reference on the subject during the latter half of the nineteenth century, and still remains of the greatest usefulness to students. Glastonbury Abbey having passed out of private hands into the custody of a body of Trustees, acting on behalf of the National Church, it was hoped that a greatly increased opportunity for research and excavation would ensue. All published plans of the Great Church had been necessarily very incomplete, in the absence of visible remains and the lack of trustworthy evidence from documents. In particular the following features were in doubt: 1. The form of the retro-quire, and eastward termination of the Abbey Church. 2. The question of a north porch to the nave, and its probable position, if it existed. RETRO-QUIRE AND CHAPELS. In 1866 Professor R. Willis published his invaluable _Architectural History_, being the substance of a communication he had made to the Archæological Institute in the year previous. He devotes two pages (40, 41) to a discussion of the number and arrangement of the chapels east of the processional path in the retro-quire, and arrives at the conclusion that they were five in number. And in his plan (Fig. 2), which appears as a frontispiece to his work, he shows these five, the central one projecting about 12 feet. On p. 43 he says: "As Bere is also said to have built Edgar's Chapel at the east end of the church, it is probable that this chapel was one of those that we are considering, and that Bere fitted it up and completed it. The complete eradication of the east wall of the church in the centre may be accounted for by supposing that the central chapel projected eastward, as I have shown in the plan, and that this chapel was Edgar's; for if it had been only one of the ordinary chapels it would not have been worth mentioning as a distinct building."[3]