It was no doubt to that end that somewhere about the year 1325 he had purchased the house at Cambridge as a hostel for the use of the Ely monks. In the Obedientary Rolls of the monastery, still treasured in the muniment room of the cathedral, there is evidence that from his time onwards three or four of the Ely monks were constantly residing at Cambridge at the convent expense, taking their degrees there, and then returning to Ely.[60] [Illustration: The Chapel, Trinity Hall] It is probable, however, that the residence of the Ely monks was, shortly after Crauden's time, transferred from this hostel to the rooms provided in Monk's College on the present site of Magdalene, for a register among the Ely muniments shows that in the twenty-fourth year of Edward III. John of Crauden's hostel was conveyed by the Prior and Convent to the Bishop of Norwich for the purpose of his proposed college. The old Monk's Hall was still standing in 1731, for it is contained in a plan of the College of that date preserved in the College library. A note in Warren's "History of Trinity Hall" informs us that a part of it was destroyed in 1823. Warren himself speaks of it as "Y^{e} Old Building for y^{e} Monks, where y^{e} Pigeon House is." Now all has vanished unless perhaps some underground foundations in the garden of the Master's Lodge. The buildings of the College, in their general arrangement, have probably been little altered since their completion in the fourteenth century. They had the peculiarity of an entrance court between the principal court and the street, like the outer court of a monastery. The original gateway, however, of this entrance--the Porter's Court, as it was called at a later date--has been removed, and the College is now entered directly from the street. It is probable that the Hall, forming one half of the western side of the principal court, was built during the lifetime of the founder, as also was the original eastern range, rebuilt in the last century. This would give a date, 1355, for these two ranges. The buttery and the northern block of buildings belong to 1374. In early days Trinity Hall shared with Clare Hall the Church of S. John Zachary as a joint College chapel. When in connection with the building of King's College the Church of S. John was removed, two aisles were added to the chancel of S. Edward's Church for the accommodation of "The Hall" students. The present chapel appears to date from the end of the fourteenth, or probably the early part of the fifteenth century. The only architectural features, however, at present visible of mediæval character are the piscina and the buttresses on the south side. The advowson of the Church of S. Edward, the north aisle of the chancel of which was for a time used as the College chapel, was acquired by the College in the middle of the fifteenth century, and has thus remained to our own day.