It was from his examination of the side walls of this crypt that Professor Willis was able to support his conjectures as to the dimensions and character of Roger's choir. Thus he traced it to the eastern transept of that choir, in the same place as the present eastern transepts, and deduced from the extra thickness of the wall in that part that those transepts had been capped by towers. Beyond this the crypt was filled up with graves, and there is now no access, but during the repairs he was able to trace so much of the walls as to make it plain that Roger's choir had a square ending, and also to mark the situation of the east end of that choir. #The Record Room.#--A chantry founded by Archbishop Zouch, but rebuilt in 1396, during the erection of the present choir, is now utilised as the record room, and contains the fabric rolls, and other documents concerning the building and constitution of the minster. The vestry and treasury date from the middle of the fourteenth century; like the record room they lie to the south of the choir. In the vestry is the famous horn of Alphus. It was given by Alph, or Alphus, son of Thorald, a little while before the Conquest. Alphus laid it on the altar of the minster, as a sign that he gave certain lands to the church. The horn is made out of an elephant's tusk. The wide end of the horn is ornamented with carvings of griffin dogs, a unicorn, and a lion eating a doe. This carving shows a strong Eastern or Byzantine influence, and may well have been of Byzantine workmanship. The horn was lost during the Civil War, but found by Lord Fairfax, who gave it back to the minster. The silver gilt chain now attached to it was added in 1675. The vestry also contains an oak chest finely carved with the stag of St. George, and dating from the early part of the fifteenth century, and the fine pastoral staff plundered from James Smyth, the Roman Bishop of Callipolis, in the streets of York at the time of the deposition of James II. Here also is the Mazer Bowl or Indulgence Cup of Archbishop Scrope. It is of wood, with a silver rim, and three cherubs' heads for feet. Round the rim is the following inscription:-- "Recharde, Arche Beschope Scrope grantis on to alle tho that drinkis of this cope x dayis to pardune, Robart Gubsone, Beschope Musm grantis in same forme aforesaide x dayis to pardune, Robart Strensalle." The cup was originally given to the Corpus Christi Guild, and afterwards passed to the Cordwainers Company. When the latter were dissolved (in 1808), the bowl was presented to the minster. The vestry also contains three silver chalices and patens taken from the tombs of archbishops; the rings of Archbishops Greenfield, Sewall, and Bowet, also taken from their tombs; and an ancient chain, probably dating from the fifteenth century. * * * * *