The passage at Fountains joins the cloister to the infirmary walk. It was developed from previous uses in the later twelfth century and thus its remains are rather disjointed. The W section has a half-barrel vault and once served as a library; the 4th bay of the rib-vaulted area was entered from the S transept and was a sacristy; the four E bays were newly-enclosed in the late twelfth century. As well as W and E entrances, there is an entrance from the transept, which is still open, and there is a blocked entrance in the S wall which led into the vestibule of the chapter house, where more books were kept [we all know the problem of books] (Gilyard-Beer 1970, 45). The passage is windowless.
For further information, see report for Fountains Abbey, church.