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
John Rylands Library prevent the air being 'fouled by the opening of the outer doors' with internal swing doors between the circulation areas and the main library to 'preserve the valuable books from injury'. By 1900 the ventilation system had evolved to include electric fans to draw in air at pavement level through coke screens sprayed with water. On opening in 1900, the library had 70,000 books and fewer than 100 manuscripts and by 2012, more than 250,000 printed volumes and over one million manuscripts and archival items. The main foundation of the library's collections acquired in 1892 was the "Althorp Library" of