John Rylands Library never operated as such. A caretaker's house was incorporated in the building until it was demolished for the extension of 1969. Electric lighting was chosen as the cleanest and safest alternative to gas but, as the use of electricity was in its early stages, the supply (110 volts DC) was generated on-site. This took some years to achieve due to the inexperience of contractors, but the library became one of the first public buildings in Manchester to be lit by electricity and continued to generate its own supply until 1950. Champneys suggested that, in order to protect the books and
John Rylands Library known of the early history of this copy of the Gutenberg Bible before it was acquired by the 2nd Earl Spencer. The library houses papyrus fragments known as the Rylands Papyri and documents from North Africa. The most notable are the "St John Fragment", believed to be the oldest extant New Testament text, Rylands Library Papyrus P52, the earliest fragment of the text of the canonical Gospel of John; the earliest fragment of the Septuagint, Papyrus Rylands 458; and Papyrus Rylands 463, a manuscript fragment of the apocryphal Gospel of Mary. Minuscule 702, ε2010 (von Soden), is a Greek minuscule