REMOVE

1. Electric lighting

WHAT

1. John Rylands Library (7)
2. Architecture (6)
3. Library buildings (5)
4. Lighting, Architectural a … (4)

WHERE

1. England: Greater Manchest … (7)
2. England: Manchester (3)

WHO

1. J.W. Singer & Sons Ltd (3)
2. Stewart Bale Ltd., Liverp … (1)

WHEN

1. 21st Century CE (3)
2. 1957 (1)
3. 2007 (1)
4. 20th Century CE (1)