At the extreme end of this eastern walk of the Cloister and at right angles with it, are the remains of what was once a spacious building. It had a fire-place at the eastern end, and a door which led out into another building that formerly adjoined it. It is 96 feet long by 36 feet wide. No idea can be formed now as to its original use. In some monasteries of the fifteenth and sixteenth centuries, chiefly the more considerable ones, there was a spacious room or hall located as this was, and furnished with benches and writing-desks, where the monks studied and wrote. It was called the "Lectorium" or Reading room. It must not, however, be confounded with the Scriptorium, which was the official quarters of the copyist. It is well to remark here that the plot of ground lying north of this building was not dug up during the excavations, but only skimmed over in order to trace the course of some walls which at intervals appeared above the surface; but, even this slight investigation was sufficient to reveal the outlines of numerous buildings that once extended in that direction and covered that whole area. Again comparing the site with Clairvaux, we find that the Infirmary and its surroundings would lie in that direction. At the extreme end of the eastern walk of the Cloister where it joins the southern one, are the remains of a stairs, which formerly led up to the Dormitory from this part of the monastery, as at Clairvaux. Near it is what is commonly called a vault, an arched chamber measuring sixteen feet by fourteen. It has a chimney, and it would seem to have had a narrow window also on the outer or southern end. Here is where the Calefactory stood in almost all the old Cistercian monasteries. This Calefactory was heated by a stove, at which the monks warmed themselves after their long vigils in winter; but their stay there was restricted to one quarter of an hour. Pope Eugenius III., when a monk at Clairvaux, under St. Bernard, had charge of the stove there, as was commemorated by an inscription over the door of the Calefactory. A son of the King of France discharged the same lowly office afterwards at Clairvaux, as the Annals of the Order testify. Adjoining this vault is a covered passage, having an entrance into the next building, which runs parallel with it. Its purpose cannot now be known. It may be that the vault or Calefactory had been converted in later times into a store-room for necessaries which were brought thence by this covered way into the Refectory, which is the next building. The Refectory measures 48 feet by 24. A few coarse flags remain in their original position, from which it may be inferred that the whole floor was once formed of them. In its western wall was the turnstile, through which the food was served from the kitchen that adjoined the Refectory on that side.