The hall and chapel of the infirmary extended east of this cloister, resembling in form and arrangement the nave and chancel of an aisled church. Beneath the dormitory, overlooking the green court or herbarium, lay the "pisalis" or "calefactory", the common room of the monks. At its northeast corner access was given from the dormitory to the necessarium, a building in the form of a Norman hall, long by broad, containing 55 seats. It was constructed with careful regard to hygiene, with a stream of water running through it from end to end.