John Rylands Library of Cumbrian sandstone, the interior a delicately shaded 'Shawk' stone (from Dalston, varying in colour between sand and a range of pinks) and the exterior, dark red Barbary stone from Penrith. built around an internal steel framed structure and brick arched flooring. The red 'Barbary plain' sandstone, which Champneys believed 'had every chance of proving durable' for the exterior, was an unusual choice in late Victorian Manchester. It proved relatively successful, as an inspection by Champneys in 1900 revealed little softening by the 'effects of an atmosphere somewhat charged with chemicals' although, by 1909 some repairs were needed. The library
Rylands Library Papyrus P52 formula_1, nevertheless continued to maintain that "The Rylands papyrus may therefore be accepted as of the first half of the second century". An altogether different approach to dating New Testament payri has been proposed by a number of paleographers in recent years, drawing on the notion of "graphic stream" developed by Guglielmo Cavallo. Rather than comparing letter forms of undated papyri directly with dated comparators, it is proposed that the hand in question should first be identified to a graphic stream representing the overall development of a particular handwriting style. "The way that individual letters are formed within these graphic