The negatives in the University Library's collection span the full period of the firm's long existence in Durham. They are a selection from the firm's stock, made at the time it was being wound up, and represent an attempt to pick out negatives relating to the city of Durham, people associated with it and places near it. The selection includes many buildings now demolished or much altered.
Outside Durham, there are negatives of Newton Hall and Coxhoe Hall, collieries in the Durham neighbourhood, miners' cottages, council housing, road works, bridge repairs, and engineering and industrial subjects commissioned by Durham County Council and other institutions and companies, including Siemens of Hartlepool and Spennymoor.
Two small groups added to the collection as gifts by Dr. C.W. Gibby are entirely unconnected with the Edis firm - about 20 stereoscopic negatives from the 1860's, and about 50 glass negatives mainly of Durham castle and cathedral taken by Reuben Green, a butler at Durham castle in the first half of the 20th century.