260 SANDSTONES OF ENGLAND AND WALES. weather, nor are they suitable for internal work, as they are apt to ‘ sweat.’ When used for building they require to be kept above ground, and also to be pro tected from rain. If these precautions are observed, these stones do not rapidly decay, and in some of the oldest parts of Westminster Abbey and the Temple Church, specimens of them may be observed in a fair state of preservation. 1 1 Mr. Burnell, C.E., Journ. Soc. Arts, i860. See also Gwilt, Encyc. Arch. p. 564.